Title :
Grating acoustic scanner using bulk acoustic waves
Author :
Chen, W.H. ; Lean, E.G.
Author_Institution :
IBM Thomas J. Watson Research Center, Yorktown Heights, USA
Abstract :
A new type of electronically scanned and focused acoustic beam scanner, based on coherent scattering of a grazing incident bulk wave with chirped frequencies by an array of surface grooves, is discussed. Experimental results of a 40 MHz bulk wave grating acoustic scanner with 1" field of view and 300 ¿m lateral resolution will be presented as a feasibility demonstration.
Keywords :
acoustic imaging; surface acoustic wave devices; acoustic beam scanner; bulk acoustic waves; chirped frequencies; coherent scattering; surface groove arrays;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19810100
