Abstract: The optical properties of CaS(Eu, Sm) electron trapping materials are investigated. Optical image of real object was detected and stored using 200 μm thick CaS(Eu, Sm) PMMA film. This kind of recording medium shows many attractive advantages such as no wet developing process, erasable and reusable, and large dynamic range. The experiments show that electron-trapping materials, as practical optical recording media, have good prospects.

Key words: electron-trapping, optical recording, optical information processing