The holographic technology is not based on light penetration but on reflection of diffused laser beams from the artwork surface. Holography and related techniques involved in structural diagnosis do not require any sample removal or surface preparation and are safe for use on varnishes and pigments. In this context, the techniques can be classified as non-destructive, non-contact and non-invasive.

Holographic interferometry with a phase-modulated reference beam is applied to an acoustic holography. A very thin, flexible, optically reflective membrane, called a pellicle, is used in the liquid as an acousto-optic interface. The method involves three processes: the motion of a pellicle caused by an ultrasonic wave is recorded as an optical hologram using holographic interferometry; the opti...

Recent advances in polarimetric SAR show promise for augmenting the capability of traditional interferometric SAR. In particular, a polarimetric topography technique provides useful slope information, and polarimetric interferometry may be used to decompose the response into vegetation and ground surface contributions. Here we discuss an integrated approach that utilizes the combined capability...

Polymerisation induced shrinkage is one of the main reasons why photopolymer materials are not more widely used for holographic applications. The aim of this study is to evaluate the shrinkage in an acrylamide photopolymer layer during holographic recording using holographic interferometry. Shrinkage in photopolymer layers can be measured by real time capture of holographic interferograms durin...

An experimental study on how reconstructed image signal and noise scale with the holographic acquisition and reconstruction parameters is proposed. Comparison with Monte-carlo simulations is performed to emphasize that the measured noise is the shot-noise. OCIS codes: (090.0090) Holography; (090.1995) Digital Holography; (120.2880) Holographic Interferometry

With seismic interferometry one can retrieve the response to a virtual source inside an unknown medium, assuming there is a receiver at the position of the virtual source. In a companion paper, Broggini et al. show that for the 1D situation the requirement of having an actual receiver inside the medium can be circumvented. They show that the virtual source response can be obtained from reflecti...

Seismic interferometry can be used to construct the Green’s function between two buried receivers in the subsurface. To construct the exact Green function sources should be placed at a surface enclosing the buried receivers. In practice sources could only be placed at the surface, and spurious events are introduced in the constructed Green’s function. The origin of these spurious events are ana...

Anisotropic self-diffraction in photorefractive Bi(12)SiO(20) crystals is applied to the investigation of dynamic holographic recording through the diffusion process. Specific attention is paid to optimization of experimental parameters for real-time holographic interferometry. The resultant interferometer is applied to obtain both timeaverage and double-exposure interferograms of vibrating and...

Interferometry offers an alternative to imaging of the CMB. Some systematic errors may be easier to control than in the imaging case. Adding interferometry is capable of correlating signals from a large number of antennas, more than is currently possible with traditional multiplying interferometers. Many of the technologies required for a space-based adding interferometer for CMB studies are th...