By establishing the sensitivity range of a work of art to environmental change suitable conditions to prevent further damage and reduce deterioration can be chosen. Further, analyses can be find-tuned depending on the investigation, in order to provide concrete evidence for the determination of acceptable environmental parameters for the display, transport and storage of works of art.2.?Experimental Description2.1. Brief review of experimental technique and backgroundIn holographic recording a single laser beam is divided into two beams, one (U0B) directed to the subject matter and the other (URB) directed to the plane of the photosensitive medium or detector as shown in Figure 1.The two beams form an intensity distribution (Ix,y) containing the phase information of the subject as an interference pattern.
The underlying principle of holographic interferometry is the sequential recording of optical wavefronts, which can later be reconstructed simultaneously.Figure 1.(a) A diagrammatic setup of a holographic interferometer sensitive to record out of plane (��) displacement where U0b is to the object wave, U0 is the surface reflection wave shown from an object point Px.y, URB is the reference wave beam, I is …Sequential holographic interferometry implemented here assumes the masking result of superimposing a reference H0 holographic record with H1-v sequential records in a masking procedure to form a temporal sequence of high resolution interference patterns. In order to obtain one interferometric evaluation the subject is slightly deformed in one of the two holograms.
Since the first and the second optical waves represent the light scattered by the object before and after
The defense and preservation of cultural heritage can greatly benefit from the development of new techniques for analysis �C in particular, non-destructive methods. In recent years, some of the most promising [1-6] have been based on the unique characteristics of the x-ray and ultraviolet radiation emitted by synchrotron sources of the ��storage ring�� class [7, 8].In most cases, the use of a synchrotron source makes it possible Dacomitinib to combine the advanced performance of standard spectroscopic and imaging methods with a high level of spatial and/or time resolution [9-11].
The developments in this domain are so fast that many potential users remain unaware of them �C and thus do not profit from their unique performances to solve problems that are otherwise difficult or impossible to tackle.This issue is particularly relevant for colleagues involved in the study and preservation of cultural heritage. In many cases, nondestructive analysis of the chemical, morphological and structural properties on a microscopic scale can assist the identification, analysis and conservation of cultural and historical specimens.