Tunable phase-based liquid acoustic lenses for spherical and line focused beamforming

Phase-based tunable liquid lenses provide for adjustable beamforming in a planar configuration. This phase-based lens is distinct from refractive liquid lens designs as no shape changes are required. Previously we reported on the beamforming capabilities of lenses utilizing four channels which performed at a level comparable to quasi-planar stepped lenses (QSLs). In this talk, we present field measurements for a lens utilizing more channels and examine the effects of these additions on forming spherical and line-focused fields. Furthermore, we compare their performance with numerical simulations and discuss the potential of these systems for nearfield droplet manipulation.