Analog optical correlation of volume holograms for searching digital databases
Geoffrey W. Burr, Holger Hanssen, Sebastian Kobras, H. Coufal · Optics in Computing · 1999
The spatial- and wavelength-selective properties of the volume hologram make it possible to overlap multiple holograms within the same volume, yet access them independently. Information displayed on a spatial light modulator can be densely packed into a photosensitive material by recording the interference fringes between coherent reference and object beams [1] (Figure la).