部分相干径向阵列光束的传输特性

The propagation characteristics of partially coherent radial array beam

利用广义惠更斯菲涅尔衍射积分方法,推导出部分相干径向阵列光束在相关和非相关叠加下通过薄透镜系统的传输公式。定量分析了光束叠加方式、子光束的空间相干参数、透镜菲涅尔数和阵列参数对部分相干径向阵列传输特性的影响。研究结果表明:经透镜传输的部分相干径向阵列光束的光强分布和最大峰值光强与光束叠加方式、子光束空间相干参数、透镜菲涅耳数以及阵列参数等密切相关。

According to the extended Huygens-Fresnel integral, the propagation formulas of partially coherent GSM radial array beam passing through a thin lens system have been derived for the two cases of the correlated superposition and the uncorrelated superposition. The effects of the superposition types, the spatial coherent parameter of array beamlet, the array beam parameters and the Fresnel number of the lens systems on the transmission properties have been analyzed quantitatively. The results show that the intensity distribution and maximum intensity peak of partially coherent radial array beam passing through a thin lens is closely related to the superposition types, the spatial coherent parameter of array beamlet, the Fresnel number of the lens sys- tem, as well as the array beam parameters.