Lensless ghost imaging for moving objects

Lensless thermal-light ghost imaging of moving objects is investigated. The second-order correlation function of thermal-light ghost imaging of moving objects is obtained by quasistatic approximation. The relationship between the visibility of the ghost imaging and the transverse coherent length l(c) is demonstrated, and the smallest distinguishable distance (or resolution) of the ghost imaging system equals l(c). We provide a method to decide a proper sampling number for ghost imaging of a moving object. (C) 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.3662429]