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Phase-shifted double single-pulse additive stroboscopic TV holography for the measurement of high-frequency vibrations using low-bandwidth phase-modulation devices

Alén de la Torre, José María; Fernández Doval, Ángel ManuelAutor UVIGO; Diz Bugarin, JavierAutor UVIGO; Vázquez Dorrío, José BenitoAutor UVIGO; López Vázquez, José CarlosAutor UVIGO; Fernández Álvarez, Antonio; Blanco García, JesúsAutor UVIGO; Perez-Martinez Perez-Amor, Mariano JesusAutor UVIGO; Fernández Fernández, José LuisAutor UVIGO
Date: 1997-09-17
UNIVERSAL IDENTIFIER: http://hdl.handle.net/11093/1008
EDITED VERSION: http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=928161
UNESCO SUBJECT: 3311.11 Instrumentos Opticos ; 2209.07 Holografía ; 2201.11 Vibraciones
DOCUMENT TYPE: conferenceObject

Abstract

We present a novel technique for the application of stroboscopic additive TV-holography to the measurement of vibrations using temporal phase-shifting. Based on a previous concept - contrived and developed by the same authors - that used two illumination pulses within each vibration cycle and interpulse phase modulation at the same rate that the vibration of the object, this new technique implements and analogous phase modulation scheme but between two swiftly alternating bursts of single pulses with different phase within each video frame, rather than using true double-pulses, thus allowing quantitative measurements to be performed with stroboscopic illumination keeping the characteristics of stability and temporal resolution of the double-pulse additive stroboscopic technique but with the additional benefit of reaching high vibration frequencies with low bandwidth phase modulators.
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