Patent ID: 7899645
Filing Date: 2011-03-01
Classification: B01J,B01L,B41J,C40B,G01F,G01N

Abstract:
1. A method of determining an energy level suitable for ejecting a droplet of a fluid with a particular toneburst waveform, comprising the steps of: (a) sending focused acoustic radiation with said toneburst waveform to a place near a surface of a quantity of the fluid in order to eject said droplet, (b) subsequent to step (a) sending a plurality of probe pulses towards the surface of the quantity of the fluid, (c) detecting a plurality of echoes from the plurality of probe pulses, and (d) based on at least an analysis of said plurality of echoes detected in (c), determining whether the energy level related to said toneburst waveform was sufficient to eject said droplet.