A theoretical study of gratings with radial symmetry and variable periods with sinusoidal profile, modulated for amplitude are shown. The behavior of the diffraction pattern and their symmetry degree of gratings were observed. Grating period can be modulated by external factor as spatial orientation effects per propagation, as inclination perspective of image projections that can produce local modified periods; this modulation kind causes changes in the diffracted pattern orders.
We study experimentally the capacity of a transmission in volume holograms, which have a phase and amplitude
modulation in a matrix of nitrocellulose. Which is photosensitized with ferric chloride salt FeCl<sub>3</sub>. They use different
sources of radiation to determine which wavelength is most efficiently achieved registration diffractive holographic
We present the performance characterization of photosensitive film emulsions prepared with saccharides like:
pectin, fructose and sugar (Glass ®), at certain physicochemical conditions for holographic recording. The
photo-oxidation was carried out with concentrations of iron ions, Fe<sup>+3</sup>. We analyzed the parameters of the
diffraction efficiencies of each grating constructed with saccharides film. The work was to achieve stability
and non-toxicity of the films prepared easily with water-Fe ions. We performed an experimental comparison
of the holographic films capacity between the three saccharides.