Blu ray Disc


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.