Digital in-line holography assessment for general phase and opaque particle S. Coëtmellec, W. Wichitwong, G. Gréhan, D. Lebrun, M. Brunel and A. J. E. M. Janssen J. Eur. Opt. Soc.-Rapid Publ., 9 (2014) 14021 Published online: 11 June 2014 DOI: 10.2971/jeos.2014.14021