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Holography in laboratory experiments pertinent to rock deformation and failure
Application of holographic interferometry to underground stress measurements
Realtime holographic measurement of crustal deformation S Takemoto
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Amagase amplitude axis borehole bulge cavity coherence length components compression crack cylinder density detected developed diameter diffraction double-exposure drill earthquake prediction elastic equation ESPI ESPI system experiments failure ﬁeld ﬁnal ﬁnite ﬁrst ﬁxed ﬂow ﬂuid fracture frequency fringe displacement fringe pattern Geophys geophysical hole hologram plate holographic interferometry holographic recording system horizontal illuminated indicates intensity interference fringes interference pattern interval L˘kberg laser light laser strainmeter light source loading maximum mirror modulation movement object wave observed obtained optical particles phase photographic plate plane pressure principal stress propagation pulse pyrophyllite reconstructed image reference beam reference wave reﬂected refractive index rock rotation sample San Andreas fault second exposure shear shown in Fig shows Slettemoen speckle interferometry speckle pattern speckle pattern interferometry Spetzler strain change strain gauges stress-relief surface deformation Takemoto technique thermoplastic transducers tunnel wall uniaxial vector velocity vibration video camera wave trains wavelength Westerly granite window zone