For requriement of plasma diagnostic system in inertial confinement fusion (ICF) drivers, simple lens which can be substituted for logarithmic axicon is designed by nonlinear-phase fitting method.

• 针对惯性约束聚变(ICF)激光等离子体诊断系统应用的需求,提出一种采用非线性相位拟合法设计单透镜代替理想对数轴锥镜的方法。