OPTICAL RECORDING, STORAGE AND RETRIEVAL PRODUCT, PROCESS, SYSTEM AND MEDIUM

摘要

An optical data storage product, including a data storage medium containing mutually spaced bodies selectively responsive to light of respective different wavelengths and respective different polarisations, said bodies being distributed in a plurality of selectably addressable regions of said data storage medium such that each region contains groups of said bodies selectively responsive to light of respective different combinations of wavelength and polarisation, wherein each group of bodies in each region can be selectively modified to store digital data in said region using light of a corresponding one of a plurality of said wavelengths and a corresponding one of a plurality of said polarisations and having an intensity exceeding a threshold intensity.