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Are You Ready For The Future?
Broadband connections that allow download of vast amounts of data, the continually growing adoption of digital music, photography, and video storage on PCs, and the costly need to back up data in business...
Commercial storage requirements are increasing exponentially with every new development. Over the past twenty years consumers and businesses have been demanding larger capacities without the need to abandon their existing collection of pre-recorded and home-recorded media or backup data storage.
Although CDs and DVDs are still able to fill a substantial portion of the market for data storage, new applications meeting higher quality requirements will eventually need larger capacities to store content. This is how it has been and this is how it will be, the demand for larger storage capacity will never cease...
The Future Is Now!
Blu-ray or Blu-ray Disc is the solution for this growing need. Offering 25 GB to 50 GB of data on a single sided disc, and boasting a physical size identical to that of today’s DVD, storage needs will be solved for many years to come.
Blu-ray Disc (BD) is developed to enable recording, rewriting and playback of High Definition (HD) video, as well as storing large amounts of data. The format offers more than five times the storage capacity of traditional DVDs and can hold up to 25 GB on a Single-Layer disc and 50 GB on a Dual-Layer disc. This means you can store over 9 hours of HD video on a 50 GB disc and about 23 hours of Standard Definition (SD) video on a 50 GB disc.
The name Blu-ray is derived from the underlying technology, which utilizes a blue-violet laser to read and write data. The name Blu-ray is a combination of "Blue" (blue-violet laser) and "Ray" (optical ray). This blue laser has a much shorter wavelength than the current red laser DVD system, which makes it possible to read and write smaller pits. As a result, Blu-ray Discs can hold more data on a single sided single layer 12 cm disc.
The storage capacity of one single layer Blu-ray Disc is equal to approximately 35 CDs.
The storage capacity of one single layer Blu-ray Disc is equal to approximately 5 DVDs (4.7 GB).
As with conventional CDs and DVDs, the Blu-ray Disc format will provide a wide range of formats of -ROM, Recordable (-R), and Rewritable (-RW). The following formats are specified for Blu-ray:
BD-ROM - Read only format, similar to CD-ROM and DVD-ROM, intended for HD movies, games, and software distribution.
BD-R - Recordable format, similar to CD-R and DVD+R/-R, for HD Video recording and data storage.
BD-RE - Rewritable format, similar to CD-RW and DVD+RW/-RW, for HD Video recording and data storage.
To ensure that the Blu-ray Disc format is easily extendable (future-proof) it also includes support for multi-layer discs, which should allow the storage capacity to be increased to 100 GB - 200 GB (25 GB per layer) in the future, simply by adding more layers to the discs. With Blu-ray Disc, you are ready for the future. What's more? With a Lite-On Blu-ray Disc drive there is also backward read and write compatibility with DVD and CD media, making Blu-ray Disc the ideal upgrade.
The data track of an optical disc is a spiral starting from the centre of the disc; the distance (in micro meters) between two rows of the track is the track pitch. It is measured from the centre of the row to the centre of the next row.When the Track Pitch can be reduced, this means that the distance between the rows is lower and that the resulting track is much longer, thus you can store more data.
The numerical aperture of an optical lens is a measure of its ability to gather light and resolve fine specimen detail at a fixed object distance. Together with the wavelength, this is how the NA or the resolution of an optical system is determined. The NA and the wavelength also define the size of the laser beam; the result of a higher NA and a shorter wavelength is a smaller laser beam.This allows focusing the beam with much higher precision and a reduction of the Track pitch.
NA Blu-ray: 0.85
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Blu-ray 
