The Stroboscope Trigger System STS 250 developed by Steinbichler Optotechnik is an essential part of the ESPI deformation and vibration analysis. It is an efficient, microprocessor-controlled device for the investigation of sinusoidally excited objects, using a CW laser as light source.

A modulator driven by the STS 250 chops the object beam relatively to the vibration of the object. The vibrating object surface is illuminated at the maximum and/or minimum amplitude to avoid a noisy holographic recording at high object velocities.

STS 250 features:

- computer-controlled (interface to image analysis software
  FRAMESplus)

- user-friendly operation

- clear display structure

- integrated driver for modulator

- synchronization of the modulator to vibration and video signal