The Blu-ray Disc belongs to a brand new generation of optical discs capable of staging high density information. Operating at a wave length of 405nm in contrast to DVDs and CDs that happen to be depending on red/IR lasers that perform at 650 and 780nm,blue-ray discs store substantially a lot more information
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The Blu-ray Disc belongs to a brand new generation of optical discs capable of staging high density data. Blu-Ray technology is depending on a blue-violet coloured laser. The blue laser operates at a wave length of 405 nm, although older technology for instance DVDs and CDs are based on red and infrared lasers that functions at 650 and 780 nm. Given that the wave length is shorter with a blue laser, the new Blu-ray technology makes is feasible to retailer substantially more info
The advantage with all the Blu-ray technology is the fact that the laser beam can be focused a great deal far more tightly at the surface in the disc. Tight concentrate implies that a smaller spot are going to be produced on the surface on the disc, and when the spots become smaller there will naturally be room for additional data on every single disc. The minimum spot size of any laser is dependent upon a naturally accruing phenomenon known as diffraction. The narrow beam of light sent out from a laser will generally diverge into a wider beam eventually, because of the natural diffraction of waves. Diffraction will also occur the waves meet an obstruction. By decreasing the wavelength of a laser, we are able to influence the diffraction.
In Blu-ray technologies, the diffractions can also be affected by the fact that the lens made use of to focus the light features a higher numerical aperture than the lenses found in ordinary DVDs – 0.85 as opposed to 0.6. Blu-ray technology based appliances are also equipped using a dual-lens system of supreme quality, and also the cover layer has been created thinner in order to stop undesirable optical effects. All this makes it possible to get a Blu-ray laser to focus on substantially smaller spots. The optical improvements are accompanied with a new method for encoding information which makes it probable to store even more information on the Blu-ray disc.
The common for Blu-ray technology has been created as a joint venture in between various key producers of PCs and consumer electronics, which includes Sony and Philips. The group is known as the Blu-ray Disc Association (BDA). The first Blu-ray recorder was launched in Japan in 2003, by Sony. Today, Samsung, JVC, Matsushita (Panasonic) and LG Electronics are all examples of businesses applying Blu-ray technologies in their goods. Hewlett Packard has announced that they are going to release desktop PCs equipped with Blu-ray technology in late 2005.
The primary competitor for the Blu-ray technologies could be the HD DVD format which is also capable of storing far more information than a normal DVD. The Blu-ray technologies does however let for additional information per layer than the HD DVD format 25 GB compared to 15 GB. The Blu-ray technology will however probably be a lot more high-priced to assistance, no less than initially, which can make the HD DVD a tempting option. Inside a Blu-ray disc, the information is stored extremely close for the surface. This made the initial Blu-ray discs incredibly vulnerable to scratching and a lot of users preferred the tougher HD DVD discs. Given that 2004, all Blu-ray discs are coated with a clear polymer called Durabis which tends to make them significantly a lot more sturdy. Based on the developers of Durabis, the TDK Corporation, a coated Blu-ray disc will perform even soon after becoming attacked with a screwdriver.