微射流粒子场的同轴Fraunhofer全息测试

Micro-jet particle field measurement using in-line Fraunhofer holography

利用超短脉冲激光作为记录光源可以在瞬间将高速运动微粒“冻结”的原理 ,建立了同轴Fraunhofer远场全息测试系统 ,研究了在爆轰加载下物质的微射流现象。获取了清晰的高速运动微射流粒子场的全息图 ,通过激光再现给出了微射流粒子的分布、形状、尺寸速度等信息。

Based on the principle of “freezing” high velocity particles,an in line Fraunhofer far field holography measurment system,which uses the ultra short pulse laser as the recording light source,is constructed.The metal micro jet is loaded by detonation.The hologram of micro jet is obtained by this system.By reconstructing the hologram,the distribution and the size of the micro jet can be analyzed.