“Blu Ray Disc”

The latest Optical Disc technology is “Blu Ray Disc”

The name Blu-ray Disc is derived from the blue laser (violet-colored) used to read and write this type of disc. Because of the beam's shorter wavelength (405 nanometres), substantially more data can be stored on a Blu-ray Disc than on the DVD format, which uses a red (650 nm) laser. A two-layer Blu-ray Disc can store 50 gigabytes, almost six times the capacity of a two-layer DVD, or ten times that of a single-layer DVD.

Blu-ray Disc was developed by the Blu-ray Disc Association, a group representing makers of consumer electronics, computer hardware, and motion pictures. As of November 6, 2008, more than 1030 Blu-ray Disc titles have been released in the United States and more than 570 Blu-ray Disc titles have been released in Japan. There are expected to be over 1300 Blu-ray Disc titles released in the United States by the end of 2008.

 The Blu-ray Disk was making  by Sony, Samsung, Sharp, Thomson, Hitachi, Matsushita, Pioneer and Philips, Mistubishi and LG Electronics.

Key Point

Blu ray Disc (BD) is the name of a next generation optical disc format.

The format was developed to enable recording, rewriting and playback of high-definition video (HD), as well as storing large amounts of data.

The format offers more than five times the storage capacity of DVDs and can hold up to 25GB on a single-layer disc and 50GB on a dual layer disc, but have the same dimension like DVD.

Blu ray Disc format was developed by the Blu Ray Disc Association, a group of the world’s leading consumer electronics, personal computer and media manufacturers. 

DVD-RAM relies on a red laser to read and write data; the new format uses a blue-violet laser instead, hence the name Blue Ray. Recent development has pushed the storage capacity to 500GB on a single disc by using 20 layers.