Scanning Laser Doppler Vibrometer

Scanning laser Doppler vibrometry, sometimes also referred to as full-field vibrometry, is a high-speed imaging measurement method for the visualization of vibrations. Scanning laser Doppler vibrometers (SLDV) from OptoMET perform non-contact vibration measurements and provide precise insights into the dynamic behavior of vibrating structures.

Scanning Vibrometers enable you to reconstruct the full surface vibration information of your studied object. Vibration modes and eigenmodes can be identified, analysed, and visualized. The propagation of surface waves can be captured, FE models validated, complex vibration processed characterized, and modal parameters determined.

Imaging vibration measurement with infrared lasers

The Optomet Scan Series was the worldwide first LDV which combined the superior signal quality of Short-Wavelength-Inrared (SWIR) laser vibrometry with the informative value of imaging methods by scanning the objects under test on a flexibly definable point grid. Being able to measure surfaces with lowest reflectivity, larger measurement distances and more measuring ranges are the key to new fields of application.

Entire workpieces are automatically tested in one measurement process without contacting the objects surface with any sensors or reflective foils. Capture local resonances and global vibration modes with the lowest effort!

Infrared Laser Scanning Vibrometer
Laser Full-Field Vibrometer
Vibration dental drill
Laser Vibrometer close-up unit
Laser Scanning Vibrometer Software

State-of-the-Art Scanning Laser Vibrometry

Optomet Scanning Laser Doppler Vibrometers set the highest technology standard available on the market and will support you obtaining precise measurement data very fast and with the smallest efforts. A selection of the most outstanding features of Optomet scanning vibrometers are:

Largest optical aperture

No other scanning vibrometer uses a larger optical aperture, and thus, collects more of the reflected laser light. This guarantees the highest measuring sensitivity.

True portability

Laser source, optics, interferometer, signal processing, and arbitrary signal generator of the scanning vibrometer are combined in one box, powered by 12 V DC. Optomet SLDV are the perfect all-in-one measurement solution that can even be used with commercially available powerbanks for mobile operation.

Intuitive hard- and software

Vibrometers and the scanning software OptoSCAN are designed for easy and intuitive use. OptoSCAN guides the user step by step through the measurement and will enable even users new to vibrometry to obtain precise vibration data in no time.

End-to-end digital signal processing

Measurement data are processed by an integrated FPGA and digitally transmitted via Gigabit Ethernet. Data processing is carried out with a sampling rate of 160 MS/s and a data resolution of up to 32-Bit, which translates to a dynamic range of 220 dB.

Additionally, all vibrometer, measurement, and signal generator settings can be remotely controlled via Ethernet. Measurement data can be simultaneously read out via the Ethernet connection and analog BNC connectors.

 

Example applications for a Laser Scanning / Full Field Vibrometer

Vibration mode of a Printed Circuit Board (PCB)

Researching defects in a Carbon-plate

Vibration animation of a metal bar

Vibration animation of a sports-car door

Characteristics - Scan Laser Vibrometer

  • Compact, truly portable and intuitive Handling
  • SWIR laser source and large aperture with best optical sensibility
  • Open data and control interfaces
  • Vibrational velocities up to ±25 m/s
  • Displacement resolutions down to 50 Femtometers
  • End-to-end digital workflow
  • 3 analog outputs with a sample rate of 160 Msamples/s
  • GBit Ethernet Digital Output
  • Remote update und upgrade via Ethernet

Technical Specifications

A detailed list of all vibrometer characteristics, including all hardware and software features, can be found in the vibrometer data sheet in Support & Datasheets.

Technical data

Category Characteristics
Measured quantity Velocity, Displacement, Acceleration
Signal processing Digital (OptoMET UltraDSP)
Frequency bandwidth DC up to 5 MHz
Maximum velocity 25 m/s
Working distance Up to 100 m
Scan angle (h x v) 50 ° x 40 °
Camera Full HD 1080p, 30x optical zoom
Ethernet Digital Output 1 GBit/s
BNC analog Outputs Displacement, velocity, acceleration, signal-generator outputs
BNC analog inputs Measurement input, 2 x reference inputs
  24-bit A/D converter per channel
  Support for IEPE (Integrated Electronic Piezoelectric) inputs
Laser wavelength Measurement laser: output power: <10 mW, eye-safe, class 1
  Targeting laser: 510-530 nm
Laser safety class Measurement laser: output power <10 mW, eye-safe, class 1
  Targeting laser: output power: <1 mW, eye-safe, class 2
Operating temperature range +5 ... 40°C
Dimensions Length x width x height (excluding handle): 450 x 224 x 180 mm
Weight 12kg
Power supply 110 -240V AC (50-60Hz) oder 15 V DC
Single-Point operation mode Max. frequency 10 MHz
  Max. velocity 24,5 m/s

Laser Vibrometer Measuring- & Data Acquisition Software

Our Scanning Laser Vibrometer can either be used in scanning operation mode using the OptoSCAN software but also in single-point operation mode using the OptoGUI Software to manage the vibrometer settings, start the measurement, and perform the data analysis. Both operation modes and programs can even be used simultaneously.  

OptoGUI Software

OptoGUI is an extensive and intuitive software for remote control, data acquisition, and data analysis when working in single-point mode. Data transfer is realized via a loss-free digital Gigabit Ethernet connection. Click for detailed information about OptoGUI.

OptoSCAN

OptoSCAN is an extensive and intuitive software for remote control, data acquisition, and data analysis when working in scanning mode. Data transfer is realized via a loss-free digital Gigabit Ethernet connection. Click for detailed information about OptoSCAN.

Available decoders

A wide variety of high-performance real-time decoders are available for the evaluation of the interferometric measuring signals. The OptoMET UltraDSP technology enables the measurement of frequencies up to 24 MHz (for Single-Point Operation Mode) and vibrational velocities up to 25 m/s, displacements can be resolved to less than 100 fm. All vibrometers incorporate a velocity decoder. Displacement and acceleration decoders are optionally available. Numerous measuring ranges per decoder ensure that measurements can always be performed with the optimum sensitivity.

Decoders can be easily retrofitted or upgraded. Start with a basic system and adapt the capabilities of the measuring instrument as required later on. This requires no return of the instrument to the factory and no waiting times for your production or research project. The table below provides an overview of the configuration options. We will also be happy to assist you in the selection of the best decoder for your measuring task.

Description

Decoder Name

Number of measuring ranges

Max. vibrational velocity

Max. Frequency

(Scan operation mode) 

Max. Frequency

(Single-Point operation mode )

 Comments 

 

Basis

Velocity Decoder D-VD-1S

8

5 m/s

80 kHz

500 kHz

Required

 

 

Displacement Decoder D-DD-1N

19

 

 

500 kHz

Optional, for Single-Point operation mode

 

 

Acceleration Decoder D-AD-1N

8

 

 

500 kHz

Optional, for Single-Point operation mode

 

Sense

Velocity Decoder D-VD-2S

12

12 m/s

80 kHz / 1 MHz

1 MHz

Required

 

 

Displacement Decoder D-DD-2N-12

19

 

 

1 MHz

Optional, for Single-Point operation mode

 

 

Acceleration Decoder D-AD-2N-12

12

 

 

1 MHz

Optional, for Single-Point operation mode

 

High Speed

Velocity Decoder D-VD-3S

11

25 m/s

80 kHz / 1 MHz

2,5 MHz 

Required

 

 

Displacement Decoder D-DD-3N

19

 

 

2,5 MHz

Optional, for Single-Point operation mode

 

 

Acceleration Decoder D-AD-3N

11

 

 

 2,5 MHz

Optional, for Single-Point operation mode

 

High Frequency

Velocity Decoder D-VD-4S

9

12 m/s

80 kHz / 5 MHz

 10 MHz

Required

 

 

Displacement Decoder D-DD-4N

19

 

 

10 MHz

Optional, for Single-Point operation mode

 

 

Acceleration Decoder D-AD-4N

9

 

 

10 MHz

Optional, for Single-Point operation mode

 

Master

Velocity Decoder D-VD-5S

14

25 m/s

80 kHz / 5 MHz

10 MHz

Required

 

 

Displacement Decoder D-DD-5N

19

 

 

10 MHz

Optional, for Single-Point operation mode

 

 

Acceleration Decoder D-AD-5N

14

 

 

10 MHz

Optional, for Single-Point operation mode

 

 

 

Accessories

Scanning Vibrometer Transport Case

Scanning Vibrometer Transport Case

Stable and waterproof Peli case for safe keeping and transport of vibrometer

External dimension (L x B x H): 63,0 x 49,2 x 35,2 cm 

Scanning Vibrometer Close-Up Unit

Close-up Unit

For measurements at the shortest distances of a few mm and less.

Infrared Light Detection Card

Detector Card

Transforming the not-visible infrared light into a spot of visible light.

Laser Vibrometer Infrared Camera

IR-Camera

For digital visualizing of the laser point. The camera can be easily mounted on the gauge rail at the top of the vibrometer.

Laser Vibrometer Tripod with Fluid Head

Tripod with fluid head

Precisely align your vibrometer with high quality tripods by Manfrotto

Mobile Battery for Laser Vibrometers

Mobile Battery

Portable battery charger, external battery power bank. For powering the vibrometer when performing outdoor measurements.

OptoMET Laser Doppler Vibrometer - High Dynamic Range

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