Bridging the gap between Soviet and Western holography

The history of Soviet holography is dominated by the invention of the reflecting hologram by Yuri Dcnisyuk, the development of ultra-fine grain recording materials by the work of Kirillov and the evolution of colloidal processing techniques under Usanov. The colloidal images so created are of very low noise and high definition and were a shock to Western scientists at the Holography meeting in Ulyanovsk in 1979. The general approach to making silver halide reflection holograms in the West is to use staining pyrogallol developers and bleaches which involve physical transfer of halide to create the modulation. This paper deals with a previously unpublished process for the silver halides created by the author in 1979 which bridges the gap between the Soviet and Western methods.