Unveiling wave patterns in complex geometries

Laser-enabled reconstruction of in-plane wavefields in cellular periodic structures.

Lattice structures are well known for a range of exotic dynamic properties, including the ability to work as band-gap filters and to propagate anisotropic waves with frequency-dependent directionality. In order to verify experimentally the anisotropy of the spatial propogation patterns, we need a non-intrusive measurement technique that allows acquiring in-plane velocity values at multiple locations. The 3D scanning laser Doppler vibrometer PSV-400-3D is the perfect device for the job.

https://www.sciencedirect.com/science/article/pii/S0022460X13007359