Helical acoustic lens
OwnerMicha Feigin-Almoninventor
Life of this patent
Estimating the term…
Abstract
A meta-material acoustic lens is based on multiple acoustic channels, having a helix shaped path arranged radially around the center. The helix pitch is a function of the helix radius. This changes the effective thickness of the lens as a function of its distance from the center of the lens. This create a phase shift gradient across the lens, which in turn changes the wavefront from one side of the lens to the other. This results with either a focusing lens, when the effective thickness decreases from center to edge of the lens, or a diverging lens when the effecting thickness decreases from center to edge of the lens.
Claims5
An acoustic lens comprising of one or more slices wherein:
- a) each slice comprises of one or more radial layers
- b) each layer comprises a plurality of radially arranged helical channels,
- c) each channel at each layer has an entrance port and a exit port,
- d) the helix pitch p of each helical channel is a function of the radius of the layer for the helical channel,
- e) if the number of slices N is larger than one then the exit port of each channel at slice I, 1≤I≤N−1 connects to the entrance port of a matched channel at slice I+1.
Dependencies are inferred from the claim text.