Details

Autor(en) / Beteiligte

• Martínez-Celorio, R.A.
• Dirckx, Joris J.J.
• Buytaert, Jan A.N.
• Martí-López, Luis
• Decraemer, Wim

Titel

Modified temporal-phase-unwrapping method for measuring in real time the out-of-plane displacements of the tympanic membrane of Mongolian Gerbil

Ist Teil von

• Optik (Stuttgart), 2008-12, Vol.119 (16), p.783-787

Ort / Verlag

Reutlingen: Elsevier GmbH

Erscheinungsjahr

2008

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• A technique for measuring in real-time continuous out-of-plane displacements of delicate objects is proposed, and demonstrated on the tympanic membrane of Mongolian Gerbil. The technique is based on the combination of two methods: the spatial phase shifting (SPS) and the modified temporal phase unwrapping (TPU). The combination allows to obtain, in several steps, the phase values of the points that undergo out-of-plane displacement as the object is deformed. The technique reduces the frame acquisition time of the standard TPU used in moiré interferometry by a factor of 4, which is important to diminish post-mortem artifacts during in-vitro experiments and to reduce motion artifacts in in-vivo tests. The proposed technique is robust against problems associated with the temporal phase-shifting method, such as nonlinear phase shift and noise. The advantages and disadvantages are discussed.