The ability of storing information by aligning of anisotropic color centers is shown by means of FA centers in KCl. The process of recording volume holograms in these crystals and the reconstruction is reported.
Artificial acetabular cubs loose their original shape and undergo deformations during implantation, caused by the polymerization shrinkage of the bone cement. In laboratory experiments, two acetabula of different material -both common in clinical use -were studied by holographic real -time interferometry during cement hardening. This method picks up characteristic features in the transient behaviour of the form changes. It is shown, that temperature, porosity and shrinkage of the cement has a large influence on the form of a polyethylene acetabulum, whereas there is only little effect on an acetabulum, made of alumina ceramic.
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