Snapshot type two-dimensional imaging stripe optical pyrometer

Abstract

The invention discloses a snapshot type two-dimensional imaging stripe optical pyrometer which comprises a target and driving system, a target surface imaging transmission system, an external integral measurement system, a compression ultrafast imaging system and a data acquisition and processing system. According to the device, a traditional stripe optical pyrometer and a compression ultrafast imaging technology are combined, a two-dimensional dynamic image of the process that inertial confinement fusion shock waves break through a target surface can be completely recorded, and the detectability of the traditional stripe optical pyrometer is expanded to two-dimensional area array measurement from one-dimensional linear measurement; the space measurement precision of the stripe optical pyrometer is remarkably improved, and an efficient technical scheme is provided for shock wave diagnosis in laser-driven inertial confinement fusion.

Description

Technical Field

[0001] The invention belongs to the technical field of shock wave velocity diagnosis, and in particular relates to a snapshot two-dimensional imaging stripe optical pyrometer, which is suitable for three-dimensional spatiotemporal measurement of laser inertial confinement fusion shock wave fronts. Background Art

[0002] Nuclear fusion obtains energy through controlled thermonuclear fusion reactions, which can provide humans with abundant, economical and safe new energy. It is the most ideal new energy for the future of mankind. Inertial confinement fusion is one of the promising ways to achieve controlled thermonuclear fusion. It compresses thermonuclear fuel through implosion to achieve thermonuclear ignition and combustion, thereby obtaining fusion energy. In the experimental research of inertial confinement fusion, in order to improve the quality of implosion compression and weaken the implosion mixing effect, it is often necessary to pulse shape the inertial confinement fusion drive source. Through fine shock wave speed regulation, it is ensured that the multiple shock waves in the target material have appropriate intensity and timing to minimize the entropy increase during shock compression and achieve near-isentropic implosion compression. The shock wave velocity is a physical quantity that can be directly measured in the experiment. It is crucial to the regulation of entropy increase during the implosion process. Precise diagnosis of shock wave velocity has become one of the key technologies in laser inertial confinement fusion research. In the research of laser inertial confinement fusion, the diagnosis technology of shock wave velocity mainly includes passive shock wave diagnosis technology and active shock wave diagnosis technology. Active shock wave diagnostic technology actively inputs a beam of probe light, and obtains the velocity history of the surface to be tested based on the Doppler frequency shift principle through the beat frequency information carried by the probe light when it is reflected on the interface to be tested. However, the optical path structure is complex, easily affected by the environment, and has a low signal-to-noise ratio. Passive shock wave diagnostic technology performs diagnosis by detecting the fluorescence generated when the shock wave breaks through the sample interface, which is called streak optical pyrometer. The streak optical pyrometer can obtain the average velocity between steps through the design of the step target, which is a simple and direct solution. However, since the streak optical pyrometer uses a streak camera with a slit to record data, it is necessary to sacrifice a certain spatial resolution in exchange for time resolution. Therefore, when measuring the interaction of multiple shock waves, usually only one-dimensional information can be collected from the two-dimensional free surface image, which is not conducive to the comprehensive analysis of spatial distribution characteristics. The core requirement of inertial confinement fusion is to achieve significant compression through spherical implosion, so it is extremely important to measure the surface velocity and temperature of the two-dimensional converged shock waves during the spherical implosion. In addition, two-dimensional imaging also plays a vital role in diagnosing the hydrodynamic instability that occurs during inertial confinement fusion. In summary, there is an urgent need to develop diagnostic techniques with two-dimensional spatial resolution and one-dimensional temporal resolution to measure various physical processes in fusion fluid dynamics. Summary of the invention

[0003] The object of the present invention is to provide a snapshot type two-dimensional imaging stripe optical pyrometer in view of the above problems existing in the prior art.

[0004] The above object of the present invention is achieved by the following technical means:

[0005] A fringe optical pyrometer for snapshot two-dimensional imaging includes a target and a driving system, and also includes a target surface imaging transmission system, an imaging system, and a data acquisition and processing system. The imaging system includes an external integral measurement system and a compressed ultrafast imaging system. The target and the driving system generate blackbody radiation light. The target surface imaging transmission system splits the blackbody radiation light into a first transmission direction and a second transmission direction. The external integral measurement system acquires integral image data of the blackbody radiation light in the first transmission direction, and the compressed ultrafast imaging system acquires compressed image data of the blackbody radiation light in the second transmission direction. Both the external integral measurement system and the compressed ultrafast imaging system are connected to the data acquisition and processing system, and transmit the integral image data and the compressed image data to the data acquisition and processing system. The data acquisition and processing system reconstructs the integral image data and the compressed image data.

[0006] As described above, the target and the driving system include a driving laser and a target. The target includes a hydrocarbon-based bottom layer, a gold shielding layer, a first aluminum film layer, and a second aluminum film layer provided with a central circular hole, which are connected in sequence. The driving laser is incident on the hydrocarbon-based bottom layer of the target.

[0007] As described above, the target surface imaging transmission system includes a first convex lens, a second convex lens, and a beam splitter cube arranged in sequence along the initial transmission direction of the blackbody radiation light. The first convex lens, the second convex lens, and the beam splitter cube are arranged on the same central axis. The beam splitter cube splits and shoots the blackbody radiation light into a first transmission direction and a second transmission direction;

[0008] As described above, the external integral measurement system includes an external camera.

[0009] As described above, the compressed ultrafast imaging system includes a transmissive random coding plate, a third convex lens, a fourth convex lens, and a streak camera arranged in sequence along the second transmission direction. The transmissive random coding plate, the third convex lens, and the fourth convex lens are arranged on the same central axis. The incident slit of the streak camera is located at the focal point of the fourth convex lens.

[0010] As described above, the driving laser includes two square-wave nanosecond flat-top laser pulses.

[0011] As described above, the data acquisition and processing system performs data reconstruction in the following manner:

[0012] First, before formally acquiring data, a predefined reference image is used as a template, and two sets of static image data are acquired in the static mode of the external camera and the streak camera. The transformation parameters between the two sets of static image data are calculated by the feature point matching method, and all image data are spatially unified to the same reference coordinate system;

[0013] Then, during signal recovery, first perform an affine transformation or a perspective transformation on the integral image data and the compressed image data according to the calculated transformation parameters to register the integral image data and the compressed image data. All the registered image data are then subjected to cropping and normalization processing to obtain normalized integral image data and compressed image data. Finally, data reconstruction is performed on the normalized integral image data and the compressed image data to obtain a two-dimensional dynamic image sequence evolving over time.

[0014] The data acquisition and processing system as described above performs data reconstruction on the normalized integral image data and the compressed image data based on the following formula:

[0015]

[0016] In the formula, is the calculation result of X within the set error tolerance range, V is the intermediate auxiliary variable introduced by the alternating direction multiplier algorithm, λ is the regularization factor, g is the regularization term, is the L 2 norm, is to calculate the values of X and V when the function takes the minimum value; s.t. X = V is the constraint condition, Y is the normalized integral image data and compressed image data at the same position; A is the observation matrix of the entire imaging system, X is the three-dimensional dynamic image data, and X inputs an initial value during calculation and is updated iteratively through calculation.

[0017] The present invention has the following beneficial effects compared with the prior art:

[0018] By combining the traditional fringe optical pyrometer with the compressed ultrafast imaging technology, the present invention uses the blackbody radiation emitted by the shock wave generated during the laser inertial fusion process as the observed object, improves the light energy utilization rate using transmissive random encoding, and combines an external camera to assist in providing contour and intensity limitations. Using an efficient reconstruction algorithm, it can reconstruct the original three-dimensional spatio-temporal information in a single measurement, and can completely record the two-dimensional dynamic image of the process of the shock wave breaking through the target surface, expanding the detection ability of the traditional fringe optical pyrometer from one-dimensional linear measurement to two-dimensional array measurement, and significantly improving the spatial measurement accuracy of the fringe optical pyrometer. While maintaining a high time resolution, the present invention significantly improves the signal reconstruction efficiency and noise suppression ability, provides a new means for the high-precision real-time measurement of the dynamic evolution process of shock waves, and provides strong experimental support for the fields of high energy density physics and materials science. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the fringe optical pyrometer of the present invention;

[0020] Figure 2 is the field of view calibration diagram of the present invention;

[0021] Figure 3 It is the random coding diagram of the present invention;

[0022] Figure 4 It is the structural schematic diagram of the target of Embodiment 2 of the present invention;

[0023] Figure 5 It is the compressed image data collected in Embodiment 2 of the present invention;

[0024] Figure 6 It is of the present invention Figure 5 Partial reconstruction result diagram obtained by algorithm recovery;

[0025] Reference numerals and corresponding component names:

[0026] 1 - driving laser; 2 - target; 3 - first convex lens; 4 - second convex lens; 5 - beam splitting cube; 6 - external camera; 7 - transmissive random coding plate; 8 - third convex lens; 9 - fourth convex lens; 10 - streak camera; 11 - computer; 100 - target and driving system; 200 - target surface imaging transmission system; 300 - external integral measurement system; 400 - compressed ultrafast imaging system; 500 - data acquisition and processing system. Detailed implementation manners

[0027] For the convenience of those of ordinary skill in the art to understand and implement the present invention, the present invention will be further described in detail below with reference to the embodiments. The embodiments described herein are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0028] Embodiment 1:

[0029] A snapshot two - dimensional imaging streak optical pyrometer includes a target and driving system 100, a target surface imaging transmission system 200, an imaging system, and a data acquisition and processing system 500. The target and driving system 100 and the target surface imaging transmission system 200 are arranged in sequence along the initial transmission direction of the blackbody radiation light generated by the target 2. The target surface imaging transmission system 200 splits and emits the blackbody radiation light of the target 2 in different directions, which are respectively denoted as the first transmission direction and the second transmission direction. The imaging system includes an external integral measurement system 300 and a compressed ultrafast imaging system 400. The external integral measurement system 300 collects the integral image data of the blackbody radiation light signal in the first transmission direction, and the compressed ultrafast imaging system 400 collects the compressed image data of the blackbody radiation light signal in the second transmission direction. Both the external integral measurement system 300 and the compressed ultrafast imaging system 400 are connected to the data acquisition and processing system 500, and transmit the integral image data and the compressed image data to the data acquisition and processing system 500. The data acquisition and processing system 500 performs data reconstruction on the integral image data and the compressed image data;

[0030] The target and driving system 100 includes a driving laser 1 and a target 2. The driving laser 1 includes two square-wave nanosecond flat-top laser pulses. The two square-wave nanosecond flat-top lasers are incident on the target 2, and the target 2 is an aluminum stepped sample arranged on a hydrocarbon substrate material. The aluminum stepped sample generates a shock wave under the action of the driving laser 1, and blackbody radiation light to be measured is generated when the shock wave breaks through the surface of the aluminum step.

[0031] The target surface imaging and transmission system 200 includes a first convex lens 3, a second convex lens 4, and a beam splitting cube 5 arranged in sequence along the initial transmission direction of the blackbody radiation light. The first convex lens 3, the second convex lens 4, and the beam splitting cube 5 are arranged on the same central axis. The beam splitting cube 5 splits the blackbody radiation light and emits it in the first transmission direction and the second transmission direction. The first convex lens 3 and the second convex lens 4 play a role in two-stage imaging and magnification of the blackbody radiation light to be measured. The beam splitting cube 5 splits the blackbody radiation light to be measured into the first transmission direction and the second transmission direction through transmission and reflection in a ratio of 5:5.

[0032] The external integral measurement system 300 includes an external camera 6. The external camera 6 collects the blackbody radiation light in the first transmission direction. The external camera 6 remains in an exposure state during the entire detection process, collects an integral image of the complete blackbody radiation emission process, and is used to provide contour constraints and intensity limitations during the calculation and reconstruction process.

[0033] The external camera 6 performs integral recording on the collected data within the exposure time, compresses the three-dimensional dynamic information I(x, y, t) into a two-dimensional snapshot E 1 (x’, y’), which can be expressed by the following formula:

[0034] E 1 (x’, y’) = T 1 I(x, y, t) + n 1 (1)

[0035] where E 1 (x’, y’) is the integral image data collected by the external camera 6, T 1 represents the spatio-temporal integral operator of the external camera 6, n 1 represents the noise generated by the external camera 6 during the data collection process, x, y, t represent the spatial and temporal coordinates of the original scene, and x’, y’ represent the spatial coordinates of the external camera 6 and the streak camera 10.

[0036] The compressed ultrafast imaging system 400 includes a transmissive random encoding plate 7, a third convex lens 8, a fourth convex lens 9, and a streak camera 10 that are sequentially arranged along the second transmission direction of the blackbody radiation light. The transmissive random encoding plate 7, the third convex lens 8, and the fourth convex lens 9 are arranged on the same central axis. The incident slit of the streak camera 10 is located at the focal point of the fourth convex lens 9 and is used to collect the radiation light in the second transmission direction. The transmissive random encoding plate 7 modulates the incident light field by electroplating a randomly distributed metal film layer on a transparent quartz glass. The light transmitted to the coated area cannot pass through, while the light transmitted to the uncoated area can pass through, achieving random spatial encoding of the two-dimensional image in terms of intensity distribution. The third convex lens 8 and the fourth convex lens 9 form a 4-f imaging system, which is used to precisely control the size and axial position of the imaging. The streak camera 10 operates in a dynamic mode during the detection process. The front incident slit is fully open, deflecting the two-dimensional time-slice image to different longitudinal spatial positions and integrating and recording it in the built-in image sensor;

[0037] The compressed ultrafast imaging system 400 encodes, deflects, and integrates the collected data in sequence, and compresses the three-dimensional dynamic information I(x, y, t) into a two-dimensional snapshot E 2 (x’, y’). The process can be expressed by the following formula:

[0038] E 2 (x’, y’) = T 2 SCI(x, y, t) + n 2 (2)

[0039] In the formula, E 2 (x’, y’) is the compressed image data collected by the compressed ultrafast imaging system 400, T 2 SC represents the observation matrix of the compressed ultrafast imaging system 400, C represents the spatial random encoding operator of the compressed ultrafast imaging system 400, S represents the time-order deflection operator of the compressed ultrafast imaging system 400, T 2 represents the spatio-temporal integration operator of the compressed ultrafast imaging system 400, and n 2 represents the noise generated by the compressed ultrafast imaging system 400 during the data acquisition process.

[0040] By simplifying I(x, y, t) to X and simplifying the observation matrix of the entire imaging system to A, formulas (1) and (2) can be integrated into matrix form:

[0041] Y = AX + N (3)

[0042] In the formula, Y = [E 1 (x’, y’), E 2 (x’, y’)] T , A = [T 1 , T2 SC] T ,N = [n 1 ,n 2 T 。

[0043] The data acquisition and processing system 500 includes a computer 11. The computer 11 controls the external camera 6 and the streak camera 10 to be turned on simultaneously during the detection process, and after the acquisition is completed, receives and stores the integral data of the entire detection process collected by the external camera 6 and the compressed data of the entire detection process collected by the streak camera 10; and performs signal reconstruction on the collected integral data and compressed data. First, the template matching technology is applied to align and transform the static signals captured by the external camera and the streak camera 10, then cropping and normalization processing are performed, and finally, an iterative algorithm based on the compressed sensing theory is used for signal reconstruction, and a two-dimensional dynamic image sequence evolving with time is obtained. Specifically:

[0044] First, before formally collecting data, a predefined reference image is used as a template, and two pieces of static image data are collected in the static mode of the external camera 6 and the streak camera 10. The transformation parameters (such as translation, rotation, scale change, etc.) between the two pieces of static image data are calculated by a feature point matching method (such as scale-invariant feature transform or fast feature point extraction) to ensure that all image data are unified to the same reference coordinate system in space;

[0045] Second, during signal recovery, first perform affine transformation or perspective transformation on the integral image data and the compressed image data according to the calculated transformation parameters to register the integral image data and the compressed image data. Then, all the registered image data are subjected to cropping and normalization processing to obtain normalized integral image data and compressed image data. Finally, a plug-and-play algorithm combining the alternating direction multiplier method and an existing image denoiser is used to perform data reconstruction on the normalized integral image data and compressed image data, that is, data reconstruction is performed on the normalized integral image data and compressed image data based on the following formula:

[0046]

[0047] In the formula, represents the calculation result of X within the set error tolerance range, V is an intermediate auxiliary variable introduced by the alternating direction multiplier algorithm, λ is a regularization factor, g represents the regularization term, represents L 2 norm, represents calculating the values of X and V when the function takes the minimum value; s.t. X = V represents the constraint condition, Y is two-dimensional image data, that is, the normalized integral image data and compressed image data at the same position, Y = [E 1 (x’, y’), E 2 ​(x’, y’) T ; A is the observation matrix of the imaging system of the present invention, A = [T 1 , T 2 SC] T ; N is the noise generated during the data acquisition process of the imaging system, N = [n 1 , n 2 T ; X is the three-dimensional dynamic image data. When calculating, an initial value is input for X, which can all be 0, and it is updated through iterative calculation.

[0048] After the signal acquisition is completed, the data acquisition and processing system 500 of the present invention restores the original dynamic data by solving the inverse problem of formula (3). The compressed data collected needs to be restored from two-dimensional to three-dimensional, which is an obvious ill-posed problem. According to the compressed sensing theory, by adding regularization constraints to the restored data, it can be transformed into an optimization problem, and finally the final solution is obtained through iterative calculation.

[0049] The present invention decomposes the optimization problem to be solved into three simple sub-problems by the alternating direction method of multipliers, and optimizes alternately and converges gradually. When the calculation meets the convergence condition or reaches the maximum number of iterations, a two-dimensional dynamic scene image that changes with time and has high quality and clarity can be reconstructed.

[0050] The present invention can be used for diagnosing the shock wave velocity during the laser inertial confinement fusion process. The device of the present invention combines the traditional streak optical pyrometer and the compressed ultrafast imaging technology, and can completely record the two-dimensional dynamic image of the process of the shock wave breaking through the target surface, expanding the detection ability of the traditional streak optical pyrometer from one-dimensional linear measurement to two-dimensional array measurement, and significantly improving the spatial measurement accuracy of the streak optical pyrometer.

[0051] Embodiment 2:

[0052] In this embodiment, in the target target and the driving system 100, the driving laser 1 uses two nanosecond laser pulses with a wavelength of 351 nm emitted by the Shenguang II prototype device of the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences. This nanosecond laser pulse has a square wave characteristic in time, a pulse duration of 2.5 ns, a flat-top characteristic in space, a single pulse energy of 150 J, and a focused spot size of 1 mm; the target target 2 includes four layers of structures, namely a hydrocarbon-based bottom layer with a thickness of 20 μm, a gold shielding layer with a thickness of 1 μm, a complete aluminum film layer with a thickness of 20 μm, and an aluminum film layer with a central circular hole. The complete aluminum film layer and the aluminum film layer with a central circular hole form a stepped shape; the driving laser 1 is incident on the hydrocarbon-based bottom layer of the target target 2, generating a shock wave and propagating inside the aluminum material. When the shock wave reaches the surface of the aluminum film, blackbody radiation light is generated.

[0053] ​In the target surface imaging transfer system 200, the blackbody radiation light is collected and magnified 15 times by the first convex lens 3 with a focal length of 150 mm and a distance of 160 mm from the target 2, and then transmitted to a position 2400 mm away from the first convex lens 3, and is collected and magnified 2 times again by the second convex lens 4 with a focal length of 200 mm and a distance of 2700 mm from the first convex lens 3; finally, the blackbody radiation light magnified 30 times is transmitted to the beam splitter cube 5.

[0054] In the external integral measurement system 300, the beam splitter cube 5 reflects half of the intensity of the magnified blackbody radiation light to the external camera 6, and the external camera 6 is set with an exposure time of 10 μs to collect the time-integrated images during the entire detection process.

[0055] In the compressed ultrafast imaging system 400, the beam splitter cube 5 transmits the other half of the intensity of the magnified blackbody radiation light signal to the chromium-plated transmissive random encoding plate 7 with a unit pixel size of 60 μm × 60 μm. The overall light intensity transmittance of the chromium-plated transmissive random encoding plate 7 is 50%, generating an encoded light signal with a random spatial intensity distribution. The encoded light signal is collected by the third convex lens 8 with a distance of 300 mm from the transmissive random encoding plate 7 and a focal length of 300 mm, and transmitted to the fourth convex lens 9 with a focal length of 200 mm. The distance between the third convex lens 8 and the fourth convex lens 9 is 500 mm, forming a 4-f system with a magnification of 2 / 3, and focusing the encoded light signal onto the fully opened entrance slit of the streak camera 10 at a distance of 200 mm from the fourth convex lens 9. The time gear of the streak camera 10 is set to 100 ns.

[0056] The overall magnification of the target surface imaging transfer system 200 and the compressed ultrafast imaging system 400 in this embodiment is 20.

[0057] Figure 2 This is the field of view calibration diagram of the present invention. Figure 2 The absolute width of each vertical or horizontal line in it is 20 μm, and the diameter of the entire field of view is 560 μm, providing a spatial guarantee for the comprehensive observation of the aluminum step sample. The static spatial resolution of the system is less than 10 μm, providing high-resolution imaging support for subsequent analysis and research.

[0058] Figure 3 This is the random encoding diagram used in the present invention. The encoding size used is 60 μm. The selection of this encoding size aims to balance the spatial resolution and data processing efficiency, enabling the system to capture extremely subtle changes and details during the inertial confinement fusion target shooting process.

[0059] Figure 4Structural diagram of the target 2 used in this embodiment. The target 2 includes a four-layer structure. The thickness of the bottom hydrocarbon-based bottom layer is 20 μm, the thickness of the middle gold shielding layer is 1 μm. The top is composed of two aluminum films. The thickness of the complete aluminum film below is 20 μm, and the thickness of the aluminum film with circular holes above is 50 μm. By measuring the time difference of the optical signals generated by the two aluminum steps, the propagation speed of the shock wave can be calculated.

[0060] Figure 5 Two-dimensional compressed image data collected by the streak camera 10 in this embodiment.

[0061] Figure 6 is Figure 5 Partial image stitching data obtained after algorithm reconstruction by the computer 11. At the beginning of the image sequence, the blackbody radiation light rapidly increases and then slowly decreases, indicating that the shock wave generated by the square-wave pulse successfully breaks through the back surface of the hydrocarbon layer and is captured through the preset small holes on the aluminum target, indicating that the relevant physical phenomena on the back surface of the hydrocarbon material have been successfully diagnosed. As time goes by, at the 1.6 ns moment, the shock wave unloading is gradually completed, and the intensity of the blackbody radiation light in the small holes basically disappears. Subsequently, a larger annular signal begins to appear, which shows the optical signal emitted when the back surface of the second-level step is penetrated by the shock wave and reaches the strongest at the 3.8 ns moment. Subsequently, the unloading behavior of the aluminum target material of the circular hole step also gradually ends. Based on the time difference (3.8 ns) of the different peak values of the measured optical signals and the thickness difference (50 μm) of the aluminum step target, the average propagation speed of the shock wave between the two steps can be calculated to be 13.16 km / s.

[0062] The device of the present invention innovatively introduces the compressed ultrafast technology into the streak optical pyrometer, realizing the precise measurement and analysis of the state of high-temperature plasma. The compressed ultrafast technology combines advanced means such as spatial encoding, time deflection, spatio-temporal compression, and algorithm decoding, and fully utilizes the advantage of single-shot multi-frame imaging of the compressed ultrafast imaging technology. In this way, it is possible to continuously detect the two-dimensional planar distribution of the shock wave speed during the target shooting process, so as to precisely measure and analyze key parameters such as the planar distribution of the plasma and energy transfer during the inertial confinement fusion process.

[0063] It should be noted that the embodiments described in the present invention are only illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A snapshot two-dimensional imaging stripe optical pyrometer, comprising a target and a drive system (100), characterized in that: The invention also comprises a target surface imaging transmission system (200), an imaging system, and a data acquisition and processing system (500). The imaging system comprises an external integral measurement system (300) and a compressed ultrafast imaging system (400). The target and driving system (100) generate black body radiation light. The target surface imaging transmission system (200) splits the black body radiation light into a first transmission direction and a second transmission direction. The external integral measurement system (300) collects integral image data of the black body radiation light in the first transmission direction. The compressed ultrafast imaging system (400) collects compressed image data of the black body radiation light in the second transmission direction. The external integral measurement system (300) and the compressed ultrafast imaging system (400) are both connected to the data acquisition and processing system (500) to transmit the integral image data and the compressed image data to the data acquisition and processing system (500). The data acquisition and processing system (500) reconstructs the integral image data and the compressed image data.

2. The snapshot two-dimensional imaging stripe optical pyrometer according to claim 1, characterized in that: The target and driving system (100) comprises a driving laser (1) and a target (2); the target (2) comprises a hydrocarbon base layer, a gold shielding layer, a first aluminum film layer, and a second aluminum film layer with a central circular hole connected in sequence; the driving laser (1) is incident on the hydrocarbon base layer of the target (2).

3. The snapshot two-dimensional imaging stripe optical pyrometer according to claim 2, characterized in that: The target surface imaging transmission system (200) comprises a first convex lens (3), a second convex lens (4), and a beam splitting cube (5) which are sequentially arranged along the initial transmission direction of the black body radiation light; the first convex lens (3), the second convex lens (4), and the beam splitting cube (5) are arranged on a common central axis; the beam splitting cube (5) splits the black body radiation light and emits it in the first transmission direction and the second transmission direction; The external integral measurement system (300) comprises an external camera (6).

4. The snapshot two-dimensional imaging stripe optical pyrometer according to claim 3, characterized in that: The compressed ultrafast imaging system (400) comprises a transmission type random coding plate (7), a third convex lens (8), a fourth convex lens (9), and a streak camera (10) which are sequentially arranged along a second transmission direction; the transmission type random coding plate (7), the third convex lens (8), and the fourth convex lens (9) are arranged on a common central axis; and an incident slit of the streak camera (10) is located at the focus of the fourth convex lens (9).

5. The snapshot two-dimensional imaging stripe optical pyrometer according to claim 4, characterized in that: The driving laser (1) comprises two square wave nanosecond flat-top laser pulses.

6. The snapshot two-dimensional imaging stripe optical pyrometer according to claim 5, characterized in that: The data acquisition and processing system (500) performs data reconstruction in the following manner: Firstly, before formally collecting data, a predefined reference image is used as a template, and two static image data are collected using the static mode of an external camera (6) and a streak camera (10), and the transformation parameters between the two static image data are calculated by a feature point matching method, so that all image data are unified into the same reference coordinate system in space; Then, when restoring the signal, the integral image data and the compressed image data are first affine transformed or perspective transformed according to the calculated transformation parameters, and the integral image data and the compressed image data are aligned. All the aligned image data are then cropped and normalized to obtain normalized integral image data and compressed image data. Finally, the normalized integral image data and compressed image data are reconstructed to obtain a two-dimensional dynamic image sequence that evolves over time.

7. The snapshot two-dimensional imaging stripe optical pyrometer according to claim 6, characterized in that: The data acquisition and processing system (500) reconstructs the normalized integral image data and the compressed image data based on the following formula: In the formula, is the calculation result of X within the set error tolerance range, V is the intermediate auxiliary variable introduced by the alternating direction multiplier algorithm, λ is the regularization factor, g is the regularization term, is the L2 norm, To calculate the X and V values ​​that make the function take the minimum value; stX=V is a constraint condition, Y is the normalized integral image data and compressed image data at the same position; A is the observation matrix of the entire imaging system, X is the three-dimensional dynamic image data, X is input with an initial value during calculation and updated through iterative calculation.

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