Polytec Presents New High Frequency Vibrometer – UHF120

12th December 2011

Polytec Ltd.

ES Admin

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This new laser Doppler vibrometer features a frequency range up to 1200 MHz. Designed for the characterization of high frequency dynamic behaviour of micro components and HF transducers. Investigating the dynamics of micro components, such as MEMS (Micro-Electro-Mechanical System), new transducer technologies and new combinations of micro- and nanotechnology with ultrasonic actuation, engineers need new methods and instruments for characterizing mechanical responses at these frequencies and displacements.

Laser-based, non-contact optical testing is the best choice since it avoids mass loading from direct contact. Thus, Non-contact Laser Doppler vibrometry optical measurement techniques have become an indispensable tool for such characterization - it non-reactively provides the entire frequency range split into phases as well as allowing analysis of transients and decay phases in the time domain.

Now Polytec's new UHF-120 Ultra-High-Frequency Vibrometer has an extended bandwidth that allows characterization of out-of-plane vibration frequencies bandwidth up to 1.2 GHz and the velocity range to more than 100m/s. Complete with a new optical design, the instrument retains the advantages and features familiar to laser vibrometer users. The system consists of a heterodyne interferometer with a controller box and XY scanning stages. The optical head provides a heterodyne detector signal that is acquired with a fast digital oscilloscope. The digitized detector signal is transferred to a PC where the heterodyne carrier is demodulated by a new software module in Polytec’s Vibsoft package for areal deflection shapes.