Tempo 2D – Multi-component Receiver

The Tempo 2D simultaneously measures two components of surface displacement — out-of-plane and in-plane motions — using a single laser probe and a single collecting optic, at high frequencies and with high sensitivity. The detection of the in-plane component enables efficient detection of shear waves, particularly when the direction of ultrasound propagation is normal to the inspection surface. The system can reconstruct the complete ultrasonic field.

High-Efficiency Optical Design

Optimised to process highly speckled beams without requiring a single speckle (as required by classical coherent receivers). Features a large 2-inch aperture for high collection efficiency on light-scattering surfaces.

Measurement Precision

Produces an analogue signal directly proportional to surface displacement at frequencies above the cutoff. The 2D configuration captures in-plane and out-of-plane displacements simultaneously without reducing out-of-plane sensitivity.

Unaffected by Low-Frequency Acoustic Noise

Performance is unaffected by low-frequency acoustic noise or turbulence in the beam path (below approximately 75 Hz without compensation; up to 10 kHz with compensation). An integrated electronic feedback loop compensates for low-frequency noise up to 10 kHz.

Signal Indicators

Integrated visual and audible signal indicators help optimise the measurement setup. Includes an internal calibration signal at 10 kHz.

Simultaneous out-of-plane and in-plane displacement measurement

Single probe laser / single collecting optic

Processes highly speckled beams — no single-speckle requirement

2-inch aperture for high collection efficiency

Electronic noise compensation up to 10 kHz

Internal calibration signal at 10 kHz

Visual and audible signal indicators

• Shear Wave Detection & Full-Field Ultrasonic Imaging
  • The Tempo 2D’s in-plane measurement capability makes it uniquely suited to detecting shear waves — especially when ultrasound propagates normally to the inspection surface. This enables full-field reconstruction of the ultrasonic wave field, including mode-converted waves that are invisible to out-of-plane-only receivers.
• Anisotropic Material Characterisation
  • Simultaneous measurement of both displacement components allows determination of elastic constants in anisotropic materials such as CFRP, textured metals, and single-crystal components. In-plane and out-of-plane data can be combined to extract wave velocities in multiple propagation directions from a single measurement.
• Adhesive Bond & Interface Integrity
  • Detection of delaminations, kissing bonds, and poor adhesion at bi-material interfaces. Shear wave sensitivity improves detection of interface defects that are difficult to detect with out-of-plane measurements alone.
• Research & Acoustic Wavefield Mapping
  • Laboratory mapping of complete acoustic wave fields — including Lamb waves, Rayleigh waves, and bulk shear modes — in plates, rods, and complex geometries. Particularly valuable for validating simulation models and characterising guided wave propagation.
• Structural Health Monitoring Research
  • Development and validation of guided wave SHM strategies. The ability to simultaneously capture both wave components provides richer data for defect localisation algorithms and wave-damage interaction studies.