Blu-ray Disc: New Storage Technology

By: Chayawee Thawornsatian


The currently DVD and CD technologies used red laser to stored and reading data that it have 650 nanometer and 780 nanometer wavelength of DVD and CD. But the new technology to store and reading data to DVD and CD developed by Sony and Phillips have only 405 nanometer wavelength. Blu-ray, blue laser technology in storing and reading data is an optical storage format created to store large amounts of high definition video and sound. The color of the laser is a hue of blue-violet and has a shorter wavelength than the red lasers.
The benefits of Blu-ray technology compare with the normal red lasers used today besides?the shorter wavelength is capable of storing a much larger amount of data using the same space and also can be read to give a clearer picture with more color and vividness.


The reason to support the above benefits is because the blue laser required a smaller spot size. The wavelength of blue-violet laser uses a 0.85nm pickup aperture. Because of the extreme density of these optical discs, it can fit a large data onto the disc such as 23.3GB of data onto single-layer Blu-ray disc and 46.6GB onto dual-layer Blu-ray disc.
Deplorable condition of Blu-ray technology is it is easy to contaminate by only scratch because of so close together of data. And the really disadvantages of these technology is the Blu-ray disc are so expensive (about the $1,000).
Blu-ray is a new release technology of the electronics market compete with HD DVD’s and looking to make for the PlayStation of Sony. Sony will include the basic with the as a standard. But the Blu-ray disc is more expensive than the standard DVD counterparts. Therefore the both of two media type must to fight to be a winner. However, the Blu-ray disc need to develop about the way to prevent the scratching of the disc or difficult to scratch for easiness competition. But another reason will make Blu-ray disc have a trouble is it has been developed in part with Sony and Sony also has digital rights management (DRM) that will make the user more difficult to place shift and time shift their content. Now the people are waiting to see who is the winner between Blu-ray and HD.

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