Tempo 1D - Ultra High Frequency Receiver

The Tempo 1D has become one of the most popular laser receivers worldwide for high frequency and ultra high frequency inspection. It is capable of detecting surface displacements resulting from the propagation of UHF ultrasounds, up to GHz.


Ultra-High Frequency

The Tempo 1D can surface displacements resulting from the propagation of Ultra High Frequency ultrasounds, up to GHz.

High Efficiency Optical Design

The Tempo 1D is optimized to process highly speckled beams. It does not require a single speckle (reflection on mirror-like surface) like classical coherent laser ultrasonic receiver. It also includes a large, 2-inch aperture for high collection-efficiency, ensuring high sensitivity on light-scattering surfaces. The Tempo 1D exhibits high optical etendue.

Measurement Precision

The Tempo 1D produces an analog signal that is directly proportional to surface displacement at frequencies above a cutoff frequency.

Unaffected by Low Frequency Acoustic Noise

Performance is unaffected by low frequency acoustic noise caused by turbulence in the beam path (Below the cut-off frequency ~ 100Hz without compensation, and up to 10kHz with the internal compensation). The Tempo 1D has an integrated electronic feedback loop that compensates for low frequency acoustic noise up to 10 kHz.

Signal Indicators

Incorporated within the system are visual and audible signal indicators designed to help the user optimize their measurement setup. For absolute calibration, the Tempo 1D also includes an internal calibration signal and its output is autmoatically calibrated to 100mV for 1nm displacement.


  • Technology  Two-Wave mixing
  • Detection  Out-Of-Plane
  • Configuration  Free-Space
  • Internal Laser power  Up to 1.5 W @532nm
  • NESD (out-of-plane motion)  2.10-7 nm. (W/Hz)1/2
  • Detection bandwidth  Up to 1Ghz
  • Dimensions  492 x 302 x 114 mm3
  • Weight  16kg
  • Electrical requirements  110V / 220V , 50Hz / 60Hz


Tempo 1D Brochure


This product could be used for the following applications:

  • Material characterisation -  Laser-ultrasonics are used to measure fundamental material properties such as the elastic modulus, shear modulus and Poisson ratio. Those parameters are of great importance for estimation of active stresses and life service
  • Acoustic emission -  The laser receiver can also be used alone, without the generation laser, to listen to acoustic emission occurring when the sample is under stress.


This product is manufactured by Sound and Bright.

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