Extended depth of focus for transmission x-ray microscope Liu, Yijin ; Wang, Junyue ; Hong, Youli ; Wang, Zhili ; Zhang, Kai ; Williams, Phillip A. ; Zhu, Peiping ; Andrews, Joy C. ; Pianetta, Piero ; Wu, Ziyu Abstract Publication: Optics Letters Pub Date: September 2012 DOI: 10.1364/OL.37.003708 Bibcode: 2012OptL...37.3708L