METHOD FOR INVESTIGATING THE PRESENCE AND/OR PROPERTIES OF A LIQUID DROPLET AND ACOUSTIC DEVICE

摘要

The invention relates to a method and an arrangement for investigating the presence and/or properties of a liquid droplet, the method comprising the steps of: a) providing a substrate (2) for receiving a liquid droplet (5), b) exciting acoustic waves in the substrate (2) by means of at least one transmitter (3), c) receiving acoustic waves evoked by the transmitter (3) by at least one receiver (4), d) evaluating a signal generated by the receiver (4) upon receipt of acoustic waves evoked by the transmitter (3), e) determining whether a droplet (5) is present on the substrate (2) and/or if a droplet is present determining the position and/or properties of the droplet using the result of step d). The invention further relates to an acoustic device for focussing an acoustic wave.