Tempo 1D – Ultra High Frequency Receiver

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.

Material characterisation
Laser-ultrasonics
Acoustic emission
Non-Destructive Testing