Optical vibration measurement

Perform your R&D and production measuring tasks using our contactless light solutions—the non-intrusive, quick, and precise way.

Non-contact vibration measurement

Polytec manufactures a wide range of laser vibrometers that are the acknowledged gold standard for non-contact vibration measurement. No matter what your measurement needs are in research, development, and production, or even for long-term monitoring, there is a Polytec system to meet them. Laser-Doppler vibrometers analyze samples of different sizes, from entire car bodies, large aerospace parts, engines, and actuators to micron-sized MEMS or biomedical specimens and components.

Numerous research applications in mechanical and civil engineering, biology, and medicine benefit from non-contact vibrometry for testing and measurement. Polytec laser vibrometers easily handle challenging conditions, such as measuring on hot surfaces and rotating parts, and characterizing complex and sensitive structures, even in the ultrasonic frequency range. Polytec laser vibration sensors help to solve your measurement task fast and precisely.

Vibrometry Brochure

VibroScan QTec The new standard for full-field vibration measurement With the new VibroScan QTec, we push reliability, flexibility, and speed to the next level. Using IR or HeNe, even the toughest measurement tasks can be mastered in your product development, quality assurance, or research projects. Measure in 1D or 3D up to 10 times faster, with improved signal quality, thanks to the patented QTec® technology.

New QTec® multipath laser interferometry The new QTec vibrometers make vibration measurements so much faster, better, and more efficient. When measuring vibrations with the patented QTec® multipath interferometry, the SNR is optimized on all technical surfaces. See in the video how QTec® interferometry ensures reliable measurements on all surfaces.

QTec products

VibroScan QTec Xtra

VibroScan QTec measures vibrations in a new way – non-contact and with unprecedented precision. With its groundbreaking multi-path interferometry and diversity combining, QTec® sets new standards for optical sensitivity and interference immunity. It determines operating waveforms and eigenmodes for NVH, acoustics, structural dynamics, ultrasound, FEA validation, and non-destructive testing, and offers frequency ranges up to 32 MHz. The Xtra Laser’s SWIR wavelength delivers more power to the measurement, enabling larger measuring distances. The combination with QTec® makes the Xtra Laser insensitive to the angle of impact and surface.

The VibroScan QTec Scanning Vibrometer ensures maximum portability. The VibroLink Ethernet data interface reliably transmits vibration measurement data to your notebook and serves as an automation interface.

Vibroscan Qtec Xtra 3D

VibroScan QTec Xtra 3D measures three-dimensional vibrations in a new way – non-contact and with unprecedented precision. With its groundbreaking multi-path interferometry and diversity combining, QTec® sets new standards in terms of optical sensitivity and interference immunity.

With three synchronous measurements from three directions, all three dimensions of the vibration open up for analysis. The hub synchronizes the vibrometers with picosecond accuracy. MIMO-capable signal generators included. The PSV software takes over the guidance, detects the position of the individual VibroScans QTec in relation to the object, synchronizes the three laser beams, and guides them over the measurement object in a μm-sized measuring spot. The results are automatically transformed into the FEA coordinate system and animated according to vibration direction.

VibroScan QTec Xtra 3D determines operational vibration modes and eigenmodes for NVH, acoustics, structural dynamics, ultrasound, FEA validation, and non-destructive testing, and offers frequency ranges up to 32 MHz. With its SWIR wavelength, the Xtra Laser brings more power to the measurement. The combination with QTec® makes the Xtra laser insensitive to the angle of impact and surface, making it ideal for 3D measurements. The VibroLink Ethernet data interface reliably transmits vibration measurement data to your notebook and serves as an automation interface.

VibroScan QTec Neo

VibroScan QTec measures vibrations in a new way – non-contact and with unprecedented precision. With its groundbreaking multi-path interferometry and diversity combining, QTec® sets new standards in terms of optical sensitivity and interference immunity.

For the first time, QTec® technology has been successfully transferred from the infrared SWIR laser to the visible helium-neon laser. With its small laser measuring spot, the precise helium-neon laser is suitable for measurements on the finest structures and even measures in and through water. These properties are a decisive advantage when determining operating vibration modes and eigenmodes in microsystems, electronics, and medical devices, for example, when analyzing sensor systems, hydrophones, or ultrasonic components, over the entire frequency range up to 32 MHz.

The VibroScan QTec scanning vibrometer guarantees maximum portability. The VibroLink Ethernet data interface reliably transmits vibration measurement data to your notebook and serves as an automation interface.