McDonnell M E, Johnson E J
Appl Opt. 1980 Sep 1;19(17):2934-9. doi: 10.1364/AO.19.002934.
In the multiple-beam laser velocimeter a large number of beams intersect to form sharp intense spots well separated by dark areas. The correlation function for particles moving through such an intensity distribution is calculated from first principles and verified experimentally. Interpretations of systems with a distribution of particle velocities can be made with less ambiguity using the multiple-beam laser velocimeter rather than the conventional two-beam model. The technique is demonstrated by measuring the velocity distribution of particles in a fast fluidized bed.
在多光束激光测速仪中，大量光束相交形成尖锐的强光斑，这些光斑被暗区很好地分隔开。从基本原理出发计算了粒子穿过这种强度分布时的相关函数，并进行了实验验证。与传统的双光束模型相比，使用多光束激光测速仪对具有粒子速度分布的系统进行解释时，模糊性更小。通过测量快速流化床中粒子的速度分布，展示了该技术。
