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Laser Vibrometer (Single Head)


Model VSM 1000 by SINUS Messtechnik GmbH

Non-Contact Vibration Measurements

Vibration Measurements

The VSM 1000 Laser Vibrometer enables easy and accurate non–contact vibration measurements on all rough and diffusive surfaces (e.g.: unfinished metal, plastic, rubber, paper, fabric, etc.). It provides an analog electrical output which is a replica of the target displacement or velocity, in a frequency range from DC to 50 kHz.

  • Self-mixing interferometric configuration for
  • Non-contact vibrations measurement
  • Class 2 laser
  • Autofocus
  • Small-size optical head
  • Easy beam alignment with automatic speckle-tracking
  • Displacement/velocity analog output
  • Frequency range from dc to 50 khz
  • Works on all diffusive surfaces

Principle of Operation

The Laser Vibrometers are based on the novel self–mixing interferometric scheme, and make use of a compact semiconductor diode laser. While conventional Laser Doppler Vibrometers/Velocimeters (LDVs) use the complex Michelson interferometric configuration, the self–mixing scheme is based on the coherent interference of the backscattered light directly into the laser diode, allowing for a reduced optics count. The Laser Vibrometers have a high sensitivity, which allows correct operation even for weak intensities of the light backscattered by the diffusive target surface.


  • Easy–to–use equipment
  • Compact-size optical head
  • AutoFocus system
  • Displacement/Velocity analog output
  • Sub-micrometer resolution


  • Non-contact measurement of vibrations
  • Automotive, Aerospace, and Mechanical Industry
  • Vibration measurement without mass-loading on small, soft and delicate structures
  • Loudspeaker and piezoceramic testing
  • Material analysis and Modal analysis
  • On–line process & quality control in industrial plants


The laser beam is aimed at the target surface and the vibration signal is readily available from the output BNC connector. AutoFocus and Automatic Speckle-Tracking functionality allow unattended operation on any diffusive surface, while an LED-bar indicator measures optical signal strength in real-time. The vibration signal can be displayed onto an oscilloscope, or supplied to a FFT analyzer for frequency domain analysis.

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