Digital In-line Holography for micro-droplet diagnostics

Digital in-line holography has been applied for the study of water droplets generated by a micro dispensing device. The micro dispenser allows the control of the droplet size by changing the pressure applied to a water reservoir. Two pressures have been used in this work: 51.7 and 103.4 kPa. The holograms acquired are mathematically reconstructed and the droplet images are analysed. The droplet sizes are found to be between 140-170 µm for a pressure of 51.7 kPa and around 100 µm for 103.4 kPa. 1