Title :
Planar acoustic microscope lens using Rayleigh to compressional conversion
Author :
Farnell, G.W. ; Jen, C.K.
Author_Institution :
McGill University, Department of Electrical Engineering, Montreal, Canada
Abstract :
A planar acoustic lens is described in which Rayleigh waves generated by a circular interdigital transducer on LiNbO3 are converted to a focused hollow conical beam in the contiguous liquid. The focal spot is comparable to that of a standard diffraction-limited lens of similar aperture; the calculated sidelobes are higher but the measured ones are comparable.
Keywords :
acoustic microscopes; lenses; LiNbO3; Rayleigh to compressional conversion; Rayleigh waves; acoustic microscope; circular interdigital transducer; contiguous liquid; focal spot; focused hollow conical beam; planar acoustic lens; sidelobes;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19800377
