OTB Gadget Blog

Blu-Ray Disk Technology?S Support To Audio Encoders

The high definition DVD disk is capable of storing 30GB of information even after using its both sides and on the other hand the storage ability of blu-ray disk reaches 50GB (25GB per side). The current CD and the DVD tape format use the red lazer for reading and recording the information onto the disk. Wavelength of DVD is 650nm and that of the CD disk format is 780nm. Wavelength has been reduced further in the new disk technology of blu-ray which was introduced by Philips and Sony. Wavelength of blu-ray is 405 nanometers. The reason to use blue laser in the blu-ray format is its shorter wavelength.

Blu-ray technology is able to record large volumes of HD sound and videos as well. Color of the lazer used in blu-ray technology is somewhat blu-violet with wavelength shorter that red lazer. The most powerful advantage of the blu-ray disc format in comparison to the normal red lazer is its capability of recording more data volume keeping the disk sizes same as the CD and DVD disk size. The picture quality is also clearer with vividness and sharper colors as well. Spot size required by the blue-lazer is also smaller. Pickup aperture of blue lazer is 0.85 nanometers. Density of the blu-ray disk is very

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