COMPUTER-CONTROLLED IMAGE ACQUISITION AND PROCESSED SYSTEM FOR SCANNING ELECTRON-ACOUSTIC MICROSCOPY

Scanning Electron Acoustic Microscopy(SEAM) with the piezoelectric cer amic sensor is a novel instrument in materials analysis. Normally the signal detected by the sensor is very weak. Signal to noise ratio shou ld be enhanced in order to observe electron acoustic image with good q uality. In this paper, the time averaging data acquisition system with computer was described and the data transferred into imaging were pro cessed with a computer. Electron acoustic pictures on PZT-type materia ls were shown in real time and refined and memorized in computer. Resu lts can also be recalled on the screen at any time.