Double reflection holography for information reduction

Technical difficulties arise in creating three-dimensional hologram signals for three-dimensional television, due to the large bandwidth required for transmission and the high resolution required in the imaging system. To overcome the first difficulty, hologram information must be reduced by, for instance, making the size of the hologram small. Information reduction was achieved in one case by compressing the bandwidth of the spatial frequency. The theoretical and experimental results for this technique are described. With this technique the wavelength effectively lies in the infrared region because of double reflection, and hence the second difficulty is also overcome.