In many precision physics experiments, due to special environmental requirements, the experiment must be carried out in a closed container, which makes it impossible to directly perform ultra-high-speed imaging measurements on a small field of view. In order to meet this demand, based on the optical fiber image bundle, this paper carried out the optical and mechanical design of the endoscopic lens, the sealed adapter lens and the ultra-high-speed camera coupling objective lens, and finally transmitted the target image to the self-developed ultra-high-speed optic-electronic framing camera. So as to realize ultra-high-speed imaging of small field of view. The resolution test and dynamic experimental verification of the designed system have been carried out. The test result shows that the surface system can achieve the high-quality imaging requirements of the small field of view on the target surface. At present, this system has been applied in related physical experiment test research.
In this paper, the three-dimensional measurement technology of structured light is combined with high-speed photography to measure and reconstruct the surface deformation of aluminum alloy target under the condition of light gas gun loading. The test designed a structured light projection system based on the Kohler illumination structure, and adopted a self-developed high-speed photoelectric camera to receive the deformed fringe image. A 100ns magnitude time-resolved three-dimensional surface measurement of the deformation of the target during the process of the light gas gun pushing the projectile into the target plate is realized. By comparing the results of 3D surface reconstruction with numerical simulation results, the reliability of the proposed method for 3D measurement under high speed impact conditions is verified.
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