Abstract

Some properties and applications of three-dimensional (3-D) static and dynamic holograms recorded in deep light-sensitive materials are reviewed. It is shown that 3-D Doppler dynamic holograms reproduce the Doppler shift of the wavelength of light scattered by the object and possess some other important properties. The main problem with deep holograms is the necessity for the development of special thick-layered light-sensitive materials. With the aim of avoiding this difficulty, the so-called pseudodeep hologram has been suggested. The pseudodeep hologram is an inclined thin hologram on which a one-dimensional object is recorded by a sagittal system of beams. At reconstruction the object is read only within the limits of a narrow line corresponding to it. It is shown that the pseudodeep hologram, similarly to a 3-D hologram, has high angular and spectral selectivity. This property of the pseudodeep hologram was used to perform some operations that are characteristic of deep holograms. In particular, experiments were performed on the reference-free recording and the associative reconstruction of a hologram, the multiple recording of many holograms in the same area of a registering material, and the reconstruction of the reference wave while the hologram was illuminated by the object wave, using Walsh-function light models as the reference sources. The inclined holograms can be used not only for registering pictures of flying wavetrains of light, as was shown previously [ Opt. Spektrosk. 26, 413 ( 1969)], but also for reproducing such pictures and for other fast time-dependent processes.

© 1992 Optical Society of America

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