摘要
采用双脉冲红宝石激光器作光源，在齿轮动态效应实验台上，用电子散斑相机，对旋转齿轮受载下的状态进行拍摄．用该方法可以拍摄到光脉冲宽度在３０～５０ｎｓ内的动态散斑图像．介绍拍摄原理，以及激光器的点燃、延时、触发和同步拍摄之间的关系，并给出实际拍得的散斑图及再现条纹图实例．
On dynamic effect experimental board,the state of rotating gear on load has been successfully shot with an electrongraphic speckle camera and by using the double-pulse ruby laser as light source.The dynamic speckle patterns in 30￣50ns pulse width can be recorded by the technique. The principle of the technique,the sequence and synchronization among laser firing,time delay and laser triggering are described. A speckle pattern and Young's inter-ference fringes are shown.
