Digital in-line holography in a droplet with cavitation air bubbles S. Coëtmellec, D. Pejchang, D. Allano, G. Gréhan, D. Lebrun, M. Brunel and A. J. E. M. Janssen J. Eur. Opt. Soc.-Rapid Publ., 9 (2014) 14056 Published online: 20 December 2014 DOI: 10.2971/jeos.2014.14056