Abstract

It is shown that high efficiency noise gratings may be recorded in dichromated gelatin when a single beam traverses a silver halide plate held in contact with a dichromated gelatin plate. A replay beam, in the same direction as the recording beam, will then reconstruct the noise radiation and will itself be depleted. Owing to swelling of the dichromated gelatin plate at processing maximum depletion occurs at a shorter wavelength. A model using geometrical constructions on the Ewald sphere is shown to be able to predict the optimum wavelength.

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