Kiefer J H, Al-Alami M Z, Hajduk J C
Appl Opt. 1981 Jan 15;20(2):221-30. doi: 10.1364/AO.20.000221.
The physical optics of the laser-schlieren technique for the measurement of rate processes in shock waves is examined in detail. The method utilizes the Kirchhoff-Huygens integral with the usual thin lens, paraxial, and Fresnel approximations, all of which are appropriate for the typical laser schlieren experiment. The resolution and sensitivity of the technique are defined for all detector separations, and a reliable method for locating the time origin in the schlieren signal is provided. Diffraction is found to have a significant effect on the shock front generated signal, and geometrical optics treatments of this signal are shown to be inadequate.
详细研究了用于测量冲击波速率过程的激光纹影技术的物理光学原理。该方法利用基尔霍夫 - 惠更斯积分以及通常的薄透镜、傍轴和菲涅耳近似，所有这些对于典型的激光纹影实验都是适用的。针对所有探测器间距定义了该技术的分辨率和灵敏度，并提供了一种在纹影信号中定位时间原点的可靠方法。发现衍射对激波前沿产生的信号有显著影响，并且该信号的几何光学处理方法是不充分的。
