Effects of overmodulation in fixation-free rehalogenating bleached holograms.

Experimental evidence of mixed gratings with a phase difference between the phase and amplitude grating in volume holograms.

The Coupled Wave Theory of Kogelnik has given a wellestablished basis for the comprehension of how light propagates inside a hologram. This theory gives an accurate approximation for the diffraction efficiency of volume phase holograms and volume absorption holograms as well. Mixed holograms (phase and absorption) have been also treated from the point of view of this theory. For instance, Guibe...

Mechanism of hologram formation in fixation-free rehalogenating bleaching processes.

The mechanism of hologram formation in fixation-free rehalogenating bleaching processes have been treated by different authors. The experiments carried out on Agfa 8E75 HD plates led to the conclusion that material transfer from the exposed to the unexposed zones is the main mechanism under theprocess. We present a simple model that explains the mechanism of hologram formation inside the emulsi...

Noise gratings in bleached silver halide diffuse-object holograms.

Noise gratings in diffuse-object holograms recorded as volume phase holograms in bleached silver halide emulsion are experimentally analyzed. Measurements of the diffraction efficiency and the noise of the holograms are taken. The experimental results obtained show that there is a drop not only in the diffraction efficiency but also in the noise that is due to the presence of noise gratings.

Investigations on Bleached Phase Holograms; Diffraction Efficiency, Scattering, and Stability

High efficiencies, low noise, and suppression of photochrome effects in bleached silver halide holography.

Interest in bleached photographic gratins and holograms arose as early as 1965.” Several theoretical investigations of photographically generated gratings showed that greatly improved efficiencies could be obtained by elimination of the absorption and reflection inherent in a silver imngc.a*Y This information stimu lated interest in improving diffraction efficiencies by bleaching processes, wi...