Posted on Friday, January 05 2007 @ 5:58 CET by Thomas De Maesschalck
The name Blu-ray Disc is derived from the blue-violet laser used
to read and write this type of disc. Because of this shorter wavelength
(405 nm), substantially more data can be stored on a Blu-ray Disc than
on the common DVD format, which uses a red, 650 nm laser. In comparison
to HD DVD, which also uses a blue laser, Blu-ray Disc has more
information capacity per layer (currently 25 GB, but test media is up to
33 GB). Several manufacturers have released 50 GB recordable BDs and
rewritable discs. All supporting studios have either already released or
have announced release of movies on 50GB discs.
In comparison to its main competitor, Blu-ray Disc, HD DVD has
less information capacity per layer (15 gigabytes instead of Blu-ray
Disc's 25). HD DVD shares the same basic disc structure as a standard
DVD: back-to-back bonding of two 0.6 mm thick, 120 mm diameter
substrates.
Learn more over at
OCModShop.
