echelon lens是什么意思

用法例句

This paper introduces the characteristics of beam propagation of laser diode array(LDA),and a pair of micro step-mirror is developed for beam shaping of high power LDA.

文中首先从半导体激光器阵列的发光特性出发,采用阶梯镜对大功率半导体激光器阵列光束进行整形,最后得到一个纤芯为400μm,数值孔径为0。