Multiple-exposure recording of holograms in the case of an extended reference-beam source

The multiple recording of holograms in the same region of a light-sensitive surface is considered in the case of an extended reference-beam source. It is shown that such a reference beam makes it possible to achieve the multiple recording of holograms of extended sources employing small deflections of the reference beam. A description is given of experiments in which up to 50 holograms were recorded on the same plate.