Energy-saving writing into an optical data store

摘要

An optical data store is proposed comprising a storage medium and a light source for storing data in the storage medium. The invention provides for the storage medium to be formed for the storage of data by heating above a threshold temperature, and the light source to be designed to focus long wave light for the purpose of heating the storage medium to a temperature below the threshold temperature and to focus short wave light, with which only the storage medium previously heated by long waves can be heated to a temperature above the threshold temperature.