Holographically stored x-ray images: gray-tone reproduction.
Storage of radiographs by holographic means is analyzed with emphasis on its gray-tone reproduction characteristics. The density range and number of gray-tone levels is found to be limited by random scattering in the holographic medium. The behavior is described quantitatively and is in satisfactory agreement with experimental data. Gray-tone resolution is shown to be reduced by speckle noise. It is shown that there exists a trade-off between speckle reduction and reproduced density range.
Holography↗