Our laserinterferometric vibrometers are ideal instruments for accurate, noncontacting, determinations of temporal changes in the positions of objects or surfaces and allow detecting mechanical vibrations at frequencies ranging from 0 to 500 kHz. These instruments have been designed based on the proven concept of our SP-Series miniature plane-mirror interferometers. The sensor heads of Series SP-S interferometers are equipped with additional optics that allow making measurements on surfaces having arbitrary roughnesses. 
The complete system consists of a modularly designed electronics unit incorporating a laser,  a compactly designed sensor head, and various interfaces. Their fiberoptic-coupled interferometer converts motions along their optical axes into interference fringes that are transmitted to their fast, high-resolution, demodulation electronics for processing. Operation and display of results employs a PC running specialized data-analysis software.