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Optical probe (OP) being developed for characterising shape and deformation of samples in confined spaces by optoelectronic holography (OEH). CCD, the high speed camera; BS, the beam splitter; BO, the borescope assembly; PZT, the piezoelectric mirror; M, the steering mirror; RB and OB, the reference and object beam fibres; MI, the microphone; SP, the sound source; K1 and K2, the illumination and observation direction vectors
