Research > Optical Metrology > Research Lines


                        Optical Metrology Group                                                                                   

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(This is the old web page of the Optical Metrology Research Group. The new page can be reached by following this link.)

Research Lines

Index

General Interests

  • Whole field measurement of deformation and vibration of mechanical parts.
  • Inspection of surfaces and defect detection (cracks, pores, etc.) on diverse materials (metal, ceramic, stone, etc.).
  • Dimensional measurements, static and dynamic: length, diameter, distance, angle, thickness, parallelism, flatness, curvature radius, velocity, acceleration, etc.

 


Current Research Lines


 

TV Holography

  • CW, Stroboscopic and Pulsed techniques.
  • Measurement of surface displacement fields of mechanical parts and nondestructive testing.
    • Static deformation.
    • Stationary vibration mode shapes (audio and ultrasonic range up to 100 kHz).
    • Narrow bandwidth travelling waves (mechanical amplitude and phase determination, ultrasonic range up to a few MHz).
    • Transient displacement fields.

Whole Field Interferometry

  • Evaluation of optical surfaces and optical phase objects.
  • Real-time phase analysis and evaluation.
  • Design of tailored phase-shifting algorithms.

Fibreoptic Reflectometry

  • Surface inspection and automatic measurement of defects (cracks, pores, etc.) on diverse materials: metal, ceramic, stone, etc.

Inspection of large structures and civil infrastructure

  • Development of a novel system for the remote measurement of dynamic deflection shapes of large structures and civil infrastructure (concrete floors and frames, bridges, etc.), based on geometrical optics techniques with laser illumination, that we have named Scanner of Dynamic Deflections (SCADD).

 


Former Research Lines


 

Spherometry

  • Curvature radius measurement by Optical-aided Spherometer, Whole Field Interferometry and Moiré methods.

Holographic Interferometry

  • Measurement of surface displacement fields of mechanical parts and nondestructive testing.
    • Static deformation.
    • Stationary vibration mode shapes (audio range).