References of "Tilkens, Bernard"
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See detailAlmost-common path interferometer using the separation of polarization states for digital phase-shifting shearography
Rosso, Vanessa ULg; Michel, Fabrice ULg; Renotte, Yvon ULg et al

in Optical Engineering : The Journal of the Society of Photo-Optical Instrumentation Engineers (2007), 46(10),

An original experimental setup for shearography with metrological applications is presented. The simplicity and the efficiency of the setup are provided by a shearing device, a prism that separates the TE ... [more ▼]

An original experimental setup for shearography with metrological applications is presented. The simplicity and the efficiency of the setup are provided by a shearing device, a prism that separates the TE and TM polarization modes with a coating and a thin glass plate placed on its face. The use of this shearing device enables an in-line and almost-common path configuration for the shearing interferometer, a path that leads to high stability and a low sensitivity to external disturbances. Moreover, the sensitivity of the interferometer can be easily adjusted for different applications by varying the shearing amount with glass plates of different thicknesses or by moving the shearing device between two lenses along the optical axis. The temporal phase-shifting method is applied through the use of a liquid crystal variable retarder. (c) 2007 Society of Photo-Optical Instrumentation Engineers. [less ▲]

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See detailHigh transmission efficiency for surface plasmon resonance by use of a dielectric grating
Lenaerts, Cedric ULg; Michel, Fabrice ULg; Tilkens, Bernard et al

in Applied Optics (2005), 44(28), 6017-6022

The efficiency of the transmission of surface plasmon waves by use of a dielectric diffraction grating is discussed. The Kretschmann device allows us to obtain a surface plasmon resonance that consists of ... [more ▼]

The efficiency of the transmission of surface plasmon waves by use of a dielectric diffraction grating is discussed. The Kretschmann device allows us to obtain a surface plasmon resonance that consists of an absorption peak in the reflection spectrum. When surface plasmon resonance occurs, the TM-polarization mode of the incident electromagnetic wave is neither transmitted nor reflected. The procedure to transform an absorption peak into a transmission peak is described. Transmittivity of 68% is obtained for a simple structure that consists of a thin-film layer of Ag coated on a volume diffraction grating and embedded between two dielectric media. The results presented herein were obtained by numerical simulations that were carried out by use of an algorithm based on the rigorous coupled-wave theory. [less ▲]

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See detailInterferometric fringes projection system for 3D profilometry and relief investigation
Moreau, Vincent; Laboury, Dimitri ULg; Tilkens, Bernard et al

in Optical Methods for Arts and Archaeology, Proceedings of SPIE, Vol. 5857 (2005)

We present a new 3D full-frame profilometer based on structured laser light projection method. This device takes advantage of the polarization states splitting technique for producing and shifting ... [more ▼]

We present a new 3D full-frame profilometer based on structured laser light projection method. This device takes advantage of the polarization states splitting technique for producing and shifting multiple sinusoidal Young’s interference patterns that are projected on the inspected surface. The principle of the technique is presented and we discuss the advantages of monochromatic light projection method as a mean to overcome ambient lighting for in-situ measurement. Some results that we obtained on objects from the Egyptian Department of the British Museum are presented to demonstrate that 3D laser profilometry is a worthwhile technique for epigraphic investigations where naked-eye inspections fail. [less ▲]

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See detailAt the crossing of physics and Aercheology : the OSIRIS project
Renotte, Yvon ULg; Laboury, Dimitri ULg; Tilkens, Bernard et al

in Europhysics News (2004), 35/6

How physics can help aercheology, including a path to the parket

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See detailThe OSIRIS Project (Optical Systems for Interferometric-Photogrammetric Relief Investigation and Scanning). Development of a device for 3D numerical recording of archaeological and epigraphic documents by optoelectronic processes
Laboury, Dimitri ULg; Renotte, Yvon ULg; Tilkens, Bernard et al

in Boehler, Wolfgang (Ed.) PROCEEDINGS OF THE CIPA WG 6 INTERNATIONAL WORKSHOP ON SCANNING FOR CULTURAL HERITAGE RECORDING (2002, September)

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See detailDéveloppement d'un système de relevé numérique des documents archéologiques en trois dimensions par des procédés optoélectroniques
Laboury, Dimitri; Renotte, Yvon; Tilkens, Bernard et al

Poster (2001, November)

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See detailProjet de développement d'un système de relevé numérique des documents archéologiques en trois dimensions par des procédés optoélectroniques
Laboury, Dimitri; Baré, Marie; Renotte, Yvon et al

Poster (2000, November)

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