Title :
Gray scale for scanning acoustic microscopy
Author_Institution :
Hughes Research Laboratories, Malibu, USA
Abstract :
The principle of a true acoustic Gray-scale standard is presented and experimentally applied to the scanning acoustic microscope (s.a.m.). The implementation is based on the impedance-matching property of a quarter-wave impedance transformer through which precise changes in reflection coefficient may be produced in a single material. The performance of the first implementation designed for 375 MHz operation is described.
Keywords :
acoustic applications; acoustic imaging; measurement standards; microscopy; Gray scale standard; quarter wave impedance transformer; reflection acoustic Gray scale; reflection coefficient; scanning acoustic microscopy;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19780440
