title: Spatial longitudinal coherence length of a thermal source and its influence on lensless ghost imaging.
abstract: The spatial longitudinal coherence length (SLCL), which is determined by the size of and the distance from the source, is introduced to investigate the longitudinal resolution of lensless ghost imaging. Its influence is discussed quantitatively by simulation. The discrepancy of position sensitivity between Scarcelli et al. [Appl. Phys. Lett.88, 061106 (2006)] and Basano and Ottonello [Appl. Phys. Lett.88, 091109 (2006)] is clarified.
authors.affiliation: Key Laboratory for Quantum Optics and the Center for Cold Atom Physics of CAS, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O. Box 800-211, Shanghai 201800, China. hlliu4@gmail.com
authors.forename: Honglin
authors.initials: H
authors.lastname: Liu
authors.forename: Shensheng
authors.initials: S
authors.lastname: Han