17 April 2001 Multipoint velocity interferometer system for any reflector and its applications
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Proceedings Volume 4183, 24th International Congress on High-Speed Photography and Photonics; (2001) https://doi.org/10.1117/12.424288
Event: 24th International Congress on High-Speed Photography and Photonics, 2000, Sendai, Japan
Abstract
A Multi-Point velocity interferometer system for any reflector (VISAR) has been developed which can simultaneously measure velocity versus time histories of two to eight points by double delayed legs or two to sixteen points by single velocity sensitivity on a target or different objects during dynamic compression. A single-frequency laser beam is divided into two to eight or sixteen individual beams that are transmitted into an experimental device by incident fibers to illuminate measured points. Diffusely reflected laser beams from different measured points are separately collected by fiber detectors and guided by signal fibers into a common 'push and pull' interfering cavity with the same delay etalon to interfere. This not only simplifies the system structure and the experimental operation, but also eliminates the system error among measured points and makes the system almost as small in volume as that of a single-point VISAR. The Multi- Point VISAR possesses all the advantages of the traditional single-point VISAR as well as the temporal and the space resolution ability. We have used it to monitor velocity histories of several points on a target in a few explosion experiments, and good experimental results were obtained.
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ZeRen Li, ZeRen Li, Ruchao Ma, Ruchao Ma, Guanghua Chen, Guanghua Chen, Yuankun Liu, Yuankun Liu, Jun Liu, Jun Liu, Jianquan Yao, Jianquan Yao, } "Multipoint velocity interferometer system for any reflector and its applications", Proc. SPIE 4183, 24th International Congress on High-Speed Photography and Photonics, (17 April 2001); doi: 10.1117/12.424288; https://doi.org/10.1117/12.424288
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