title: Simultaneous strain and coherent imaging using coupled photorefractive holography and shearography through scattering media.
abstract: The direct simultaneous acquisition of coherent imaging and strain information is of particular importance in the biomechanical characterization of biological tissue. This type of simultaneous information acquisition can be accomplished using a coupled photorefractive holography and shearography system for imaging and strain measurements, respectively. Optical scattering in a conventional speckle shearing interferometer rapidly reduces the contrast of the shearing fringes, thereby limiting the use of such interferometers with opaque surfaces. By coupling photorefractive holography with speckle shearing interferometry, properties of the photorefractive effect (spatial high-pass filtering and temporal low-pass filtering) combine to restore the shearing fringe contrast and enable strain imaging in diffusing media. This effect is demonstrated using synthetic scattering phantoms built from suspensions of silica spheres in water.
authors.affiliation: Université de Liège, Département de Physique, Laboratoire HOLOLAB, Bât. B5a, B-4000 Liege, Belgium.
authors.forename: Vanessa
authors.initials: V
authors.lastname: Rosso
authors.forename: Rémy
authors.initials: R
authors.lastname: Béland
authors.forename: Sylvain
authors.initials: S
authors.lastname: Lecler
authors.forename: Yvon
authors.initials: Y
authors.lastname: Renotte
authors.forename: Serge
authors.initials: S
authors.lastname: Habraken
authors.forename: Yves
authors.initials: Y
authors.lastname: Lion
authors.forename: Paul
authors.initials: P
authors.lastname: Charette
mesh_terms: D055119:Elastic Modulus; D054459:Elasticity Imaging Techniques / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006696:Holography / Q000295:instrumentation*; D008027:Light; D009391:Nephelometry and Turbidimetry / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D033081:Shear Strength; D041623:Tomography, Optical Coherence / Q000295:instrumentation* / Q000379:methods