Nonlinear recording of focused-image holograms

An investigation was made of the influence of the ratio of the intensities of the object and reference beams and of the duration of exposure on the nonlinear distortions in Fresnel and focused-image holograms. It was found that such distortions in focused-image holograms were independent of the ratio of the intensities and of the exposure time in a wide range of both of these quantities.