STATISTICAL-MODEL FOR NOISE GRATINGS RECORDED IN VOLUME HOLOGRAMS

A statistical model is used to study the formation of noise gratings i n holograms and the mechanism that causes radiation scattering in them . The theoretical model presented describes noise scattering in terms of diffraction due to the high number of spurious gratings formed duri ng the recording stage by the interference of a single reference beam with its own scattered radiation. Numerical results calculated from th e theory showing the dependence of noise grating efficiency on exposur e are compared with experimental results obtained with bleached emulsi ons, and good agreement is found.