LASER VIBROMETRY

Polytec’s Vibrometers are indispensable tools to optimize parts and goods and to investigate natural dynamic processes
Originally developed to characterize man-made products, technology and systems, non-contact laser-Doppler vibrometry is also exploring measurements that unravel the mysteries of biological structures.

 

The heart beats, wings flap, sounds are sent out and received – life would be much too quiet without vibrations. To investigate vibrating systems in nature requires sensitive and flexible measurements that don’t disturb the specimen. Challenging tasks in medicine, biology and many other sciences take advantage of Polytec‘s universal modular vibrometers, single-box portable devices, or high-end scanning systems.

 

In the field of industrial research and development, Polytec’s vibrometers are used to study objects of very different sizes including large automobile bodies, airplane fuselages, ship engines and buildings as well as tiny silicon micromachines, hard disk drive components and wirebonders. There are numerous other research applications in mechanical and civil engineering.

 

Demanding applications such as measurements on hot running exhausts, rotating surfaces, underwater objects, delicate structures or ultrasonic devices are all made possible by non-contact laser vibrometry.
At the heart of every Polytec vibrometer system is the laser Doppler vibrometer – a very precise optical transducer used for determining the vibration velocityand displacement at a point by sensing the frequency shift and phase variation of back scattered laser light from a moving surface
 

 


 

Single-point vibrometers measure the amount of vibration at a single point on an object's surface. It measures the projected component of an object's surface vibration vector along the direction of the incident laser beam. Tthe instrument is sometimes referred to as an out-of-plane vibrometer.

Special vibrometers such as High Frequency Vibrometers for ultrasonic applications, Rotational Vibrometers for torsional vibration measurement, In-Plane Vibrometers for transverse (in-plane) vibration measurement, Tri-Axial Vibrometers for simultaneous measurement of vibration along 3 axes and Long Range systems for remote sensing of velocity and displacement.

Scanning vibrometers are instrumental in better understanding how waves propagate in complex structures for various applications, from noise control at low frequencies to damage detection at ultrasonic frequencies.

Structural vibration measurement tasks is provided with scanning vibrometer solutions for frequencies from DC up to 24 MHz and vibrational velocities of 0.01 μm/s up to 20 m/s.

Microscope-based systems for a variety of Microelectromechanical systems (MEMS), Polytec has developed an innovative line of microscope systems for the measurements of MEMS dynamics and topography, including 3D and Ulta-High frequency systems (1,2 GHz)

Vibrometer accessories Each application is unique, each measurement is important, each set-up must be correct. Thus a need for various accesories like, tripods, positioning equipment, test stands, optics, surface preparation supplies, carrying cases, softaware and data aquisition is needed.

Polytec software products provides powerful tools that control the measurement, process data, provide intuitive and animated data visualization and interface with third-party software for modal analysis, FEM and other applications.