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.
© 2008 Optical Society of America
Coherence and Statistical Optics
Original Manuscript: February 26, 2008
Revised Manuscript: March 10, 2008
Published: April 11, 2008
Honglin Liu and Shensheng Han, "Spatial longitudinal coherence length of a thermal source and its influence on lensless ghost imaging," Opt. Lett. 33, 824-826 (2008)