The characteristics of front-end light, a key problem in EFISI(Echelon-Free Induced Spatial Incoherence), is analyzed in this paper, and a new partial coherence light source is researched here.

• 对无阶梯诱导空间非相干技术中前级光源太弱的问题进行了分析，开展了前级部分相干源的研究工作。