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.