The holographic gratings on photopolymer films are studied by different spatial frequency and thickness to determine the
evolution of diffraction efficiency during holographic recording. The experimental results are presented like a function of
energy exposure, thickness and spatial frequency. The photopolymer emulsion is prepared with potassium dichromate
and nickel (II) chloride hexahydrate in polyvinyl alcohol matrix. The maximum diffraction efficiency reached is at
spatial frequency (f2) for sample A.
The holographic gratings on photopolymer films are studied by three different thicknesses for samples A, B, and C. The photopolymer emulsion is prepared with potassium dichromate and nickel (II) chloride hexahydrate in polyvinyl alcohol matrix. The evolution of diffraction efficiency is evaluated during holographic recording with and without voltage as a function of energy exposure by changing the thickness. The curves of diffraction efficiency reach a peak when the films are continuously exposed to energy for a period of time. Sample B obtains the highest diffraction efficiency
The study was carried out during real time holographic gratings formation when the coating emulsions age as a function
from the time. The experiments are studied by influence of hologram parameters to get the diffraction efficiency at room
conditions through changes of electrical potential application and pH dependence on coating solutions for hologram
Volume holography is a research topic that was generated considerably a big interest of the storage information
during the last decades. The different systems of storage holographic are principally determined by the physic and
chemical characteristics of the storage material. We use an organic conductive material based on polyvinyl alcohol
(PVA) for the volume holographic storage. We presented some electro-optics results and physic - chemicals
properties of the material used for holographic storage.
The influences in the diffraction efficiency parameter as change different variables into material and the qualitative
results of other electro-optical parameters examined.
Polymer films mixed with metals salts are a novel organic material with applications in technology process for
optical information storages. In this work we show quantitatively some optical and electrical characteristics of a
composite organic conductive as holographic material. We show a material with the optical properties that depend
of physics and chemical changes, which we register, the process and manipulate adequately parameters to obtain
better results in the diffraction efficiency.
The sugar matrix is used to record of phase holograms; it was modified with the purpose of obtaining a hydrophobic
material to improve the stability of the registered image and to stimulate the photosensitivity of the sugar. The new
material is formed by a sugar, pectin and vanillin dissolution. The diffraction efficiency parameter increases in
comparison with only the sugar matrix, obtaining already of 10%.
Characterization of the organic conductive materials is studied by voltage application during holographic gratings
formation and when the exposure time of 900 seconds was reached. The behavior of the material is analyzed by
diffracted intensity and exposure energy. Diffraction efficiency parameter of holographic gratings were studied in an
organic conductive material like dichromated poly(vinyl alcohol) films doped with nickel(II) chloride hexahydrate. The
study includes a comparative analysis between the experimental results obtained.
Holographic properties of dichromated gelatin (DCG) colored with triphenyl dyes (TDCG), were
studied. We described experimental techniques for its register of these holograms. This emulsion has
excellent resolution and behavior. That increase the photo sensibility respect to conventional DCG and is
easy to use.
Experimental techniques are described to register holograms in DC-PVA doped with organic
colorants. This material has excellent resolution and behavior to increase the photo sensibility. We report
some preliminary results.
The photopolymers are very attractive materials for applications and as holographic storage, for theirs high
modulation and photosensitivity. We report the evolution of diffraction efficiency parameter from volume
holographic gratings recorder in PVA doped with CuCl2 (2H2O), which is the result of the physic-chemical changes
between the light and the material. The resultant variation of the grating diffraction efficiency parameter is examined.
Experimental results to the saturation and diffraction efficiency from holographic gratings are presented in this investigation. The experiments were carried out during real time holographic gratings formation. Dichromated poly(vinyl alcohol) was doped with nickel(II) chloride hexahydrate and it is used like optical material. The influence of the hologram parameters to get the maximum diffraction efficiency is studied at room conditions. This study contributes to get more information about the behavior of this material for holographic gratings recording.
We showing some properties using materials as dichromate polyvinyl alcohol (DC-PVA), it is doped with natural colorant, it were investigated and compared to the pure dichromated polyvinyl alcohol. The material increasing the sensibility, and present a good photo sensibility Preliminary studies shows, some properties with the ability to storage information, and present a technique to
obtain holograms with these colored materials, and some experimental results. The best advantage of this DYE-DC-PVA holograms is the speed of recording.
This work presents experimental results of intensity changes by polarization conditions at the resultant diffraction
patters. The substrate used as retarder plate was a commercial transparency film for use with plain paper copier (3M-PP2900TM).
The conductive material composition was introduce to dichromated poly(vinyl alcohol) by adding a metallic
salt as nickel(II) chloride hexahydrate. Some electro-optical characteristics of organic conductive material that are used
in the holographic gratings storage specifically when applied voltage.
The electro-optical changes of holographic gratings were analyzed when hologram formation was carried out in
presence of applied voltage. Diffraction efficiency parameter of holographic gratings were studied in dichromated
poly(vinyl alcohol) films and dichromated poly(vinyl alcohol) doped with nickel(II) chloride hexahydrate. The electrical
changes of the materials were analyzed as a function of surface and volume resistivity.
Experimental techniques are described for recording holograms in dichromate gelatin doped with an organic
dye. This material has excellent resolution, and increase the photo sensibility. We present some basic studies about the
possible form of to storage information, and reported results. This material is cheap, easy of to use, and it decrease the