The measurement of vibration amplitudes ranging from several angstroms to several hundred angstroms is a subject of interest, because this is the range of acoustic emission signals, and calibration of transducers at f...The measurement of vibration amplitudes ranging from several angstroms to several hundred angstroms is a subject of interest, because this is the range of acoustic emission signals, and calibration of transducers at frequencies, for example, higher than 50 kHz also needs the amplitudes within this range. Two laser展开更多
文摘The measurement of vibration amplitudes ranging from several angstroms to several hundred angstroms is a subject of interest, because this is the range of acoustic emission signals, and calibration of transducers at frequencies, for example, higher than 50 kHz also needs the amplitudes within this range. Two laser
