TDK BD-R 4x 50GB Blu-ray Disc Jewel Case

TDK BD-R 4x 50GB Blu-ray Disc Jewel Case from Saverstore

The Blu-ray Disc format utilises a blue-violet laser with a shorter wavelength to enable higher storage capacities. Compared to a CD with an infrared laser and a wavelength of 720nm or a DVD with a red laser and a wavelength of 650nm, the Blu-ray Disc format utilises a blue-violet laser with a wavelength of only 405nm. A nm is equal to a millionth of a millimetre. Due to the blue-violet laser's shorter wavelength, it is possible to write smaller data pits and therefore to drastically increase the data density on the Blu-ray Disc compared to CDs and DVDs. The structure of a Blu-ray Disc differs fundamentally from the structure of a CD or DVD. The recording layer of the Blu-ray Disc is covered by a mere 0.1mm thin cover layer in order to achieve an optimal distance between the data track and the drive's optical system. After all, a CD's finishing layer is 1.2mm thick and a DVD is 0.6mm.

£21.74