Blu-ray set to take the world by storm!

The Blu-ray disc among a new generation of optical disk location of the production of high density data. Blu-ray technology is based on a blue-violet colour laser. The blue laser operates at a wavelength of 405 nm, while older technology such as DVDs and CDs based on red and infrared, laser 650 and 780 nm works. Because the wavelength is shorter with a blue laser, the new Blu-ray technology makes is possible to store much more information that the advantage with the Blu-ray technology is that the laser beam much more closely can be aligned the disc surface. Close focus means that a small town on the surface of the CD is produced, and if the spots become smaller of course there is room for more information on each disc. The minimum size of the spot hanging all laser a natural incurred phenomenon called diffraction. The narrow beam of a laser sent is always in a wider beam finally due to the natural diffraction differ from waves. Diffraction is also occur, the waves meet an obstruction. We can influence the diffraction reducing wavelength of the laser.

In Blu-ray technology the diffractions is also by the fact that the lens used to focus the light affects a higher numerical aperture as the lenses which has found in ordinary DVDs - 0.85 instead of 0.6. Blu-ray based appliances are technology with a dual-lens have been equipped of the highest quality and the cover layer thin optical effects achieved to avoid undesirable. All this makes it possible to focus for a Blu-ray laser on much smaller spots. The optical improvements are accompanied with a new method for encoding data allows to store more data on Blu-ray disc.

The standard for Blu-ray technology was developed as a joint venture between several major manufacturers of personal computers and consumer electronics including Sony and Philips. The group is that Blu-ray Disc Association (BDA) known. The first Blu-ray recorders introduced by Sony in Japan 2003. Today, JVC, Samsung, LG Electronics, Matsushita (Panasonic) are with Blu-ray technology in your products examples of companies. HP has announced that desktop PCs equipped with Blu-ray technology, late 2005 release.

The main competitor for the Blu-ray technology is the HD DVD format stores more information than a normal DVD. Blu-ray technology allows however more information per layer as the HD DVD format - 25 GB compared to 15 GB. Blu-ray technology will on the other hand most likely expensive support more, at least initially, which can make HD DVD an enticing alternative. The data is stored in a Blu-ray disc very close to the surface. The first Blu-ray discs making extremely susceptible to scratches and many users prefers the tougher HD DVD discs. Since 2004 all Blu-ray discs are coated with a clear polymer, called "Durabis" which makes much more durable. According to the developers of Durabis, TDK Corporation, coated Blu-ray disc will work even after attacked with a screwdriver.