%0 Journal Article %T In situ aberration measurement method using a phase-shift ring mask %A Li, Sikun %A Wang, Xiangzhao %A Yang, Jishuo %A Duan, Lifeng %A Tang, Feng %A Yan, Guanyong %A , %J Journal of Micro/Nanolithography, MEMS and MOEMS %V 14 %N 1 %P 011005-011005 %@ 1932-5150 %D 2015-01-01 %I SPIE %~ DeepDyve