Blu ray Disc

Abstract

Sony company and other companies worked on project to invent blue ray technology in 2002. The technique use the blue ray which it has shortest wavelength than a red laser which is used in CD and DVD so we can store huge amount of data on one layer, where the new devices like play station 3 will support this technique. we will describe the details of this technology starting with the history of the discs development, why the name blu-ray, the formats of blu-ray, recording & play back technology and comparison between it and other technique.