3. What is Blu Ray?
• Blu-ray, also known as Blu-ray Disc.
• It is the name of a next-generation optical disc format.
• It was developed to enable recording, rewriting and
playback of HD video
• storing large amounts of data.
• The first blue laser was developed in 1996 by Shuji
Nakamura (Nichia Corporation).
4.
5. Why the name Blu Ray?
• The name Blu-ray is derived from the underlying
technology, which utilizes a blue-violet laser to read and
write data.
• The name is a combination of "Blue" (blue-violet laser)
and "Ray" (optical ray).
6. Why Blu instead of Blue?
• According to the Blu-ray Disc Association the spelling of
"Blu-ray" is not a mistake, the character "e" was
intentionally left out so the term could be registered as
a trademark.
7. Who developed Blu-ray?
• The Blu-ray Disc format was developed by the Blu-ray
Disc Association (BDA).
• A group of leading consumer electronics, personal
computer and media manufacturers, with more than 170
member companies from all over the world.
8. Variations
• The plastic disc is 120 millimetres (4.7 in) in diameter
and 1.2 millimetres (0.047 in) thick, the same size as
DVDs and CDs.
• Conventional or pre-BD-XL Blu-ray discs contain
25 GB per layer, with dual layer discs (50 GB) being the
industry standard for feature-length video discs.
• Triple-layer discs (100 GB) and quadruple-layer discs
(128 GB) are available for BD-XL re-writer drives
9.
10. Comparison: CD, DVD & Blu-ray Disc
• Due to the fact that the data layer on a Blu-ray Disc is
placed much “closer” to the laser lens than in DVD ,
there is less distortion resulting in significantly improved
tolerances. Hence, more precision and ultra high storage
densities are made possible.
15. Conclusion
• Blu Ray is getting popularised day by day because of its
advantages over conventional CD and DVD. It is sure
that one day will come where there will be no foot prints
of CD,DVD
