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Blue Ray Discs: Using a Blue-Violet Laser to Read and Write Information
Blue ray discs are the newest intervention in technological sphere. This latest optical disc system is a remarkable creation of the BDA (Blu Ray Disc Association) which consists of TDK, Thomson, Sharp, Pioneer, Philips, Mitsubishi, Sony, JVC, Panasonic, Samsung, Apple, Hitachi, LG, Dell and HP. The BDA boasts 180 of the world's leading consumer electronics, media and personal computer manufacturers.
Just as the name denotes, the blue ray discs use a blue-violet laser to access data as against the existing technology of red laser. A blue-violet laser (405nm) possesses very shorter wavelength than a red laser (650nm), thus enabling the focusing of the laser spot with exceptional accuracy. The plus point of this is that it allows data to be held in smaller space as the data could be squeezed in compactly which in turn allows the user to store extra data on the disc even though the disc is more or less the same size as a compact disc or a DVD.
Moreover, blue ray discs afford a comprehensive storage capability. A single-layer blue ray disc can store up to 27GB of data which is more than 2 hours of high-definition video and 13hours hours of standard video. The dual-layer blue ray disc can store 50GB of data which is 4.5hours of high-definition video and more than 20hours of a standard video.
Blue ray discs are the ideal expression of the last in consumer experience. It further allows the recording, rewriting, playback and distribution of high-definition videos. The blue ray discs have been founded on the bare disc physical form factor which makes it compatible with CDs and DVDs.
Blue ray discs are soft on the producers too as these are made by injection-molding technique on a single 1.1-mm disc in contrast to the traditional which by that cuts down on overheads. The costs thus saved are spent on the addition of the shielding layer necessary on blue ray discs with the result that the end price being more or less the same as that of a DVD. Blue ray discs also boasts of an advanced data transfer rate of thirty-six Mbps over the present-day DVDs that does the data transferring @ ten Mbps. This means that it would take only an hour and a half to record 25GB of data onto a blue ray disc.
Originally, the existing conventional DVDs and compact discs were introduced with just read-only formats. The blue ray discs however, plan to provide a wide range of formats that include BD-ROM (read only), BD-R (recordable) and BD-RE (rewritable) and BD-RE (rewritable).
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