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- 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).
- 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
- 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.
- 11. Features of BLU-RAY Disc • MANUFACTURING • RECORDING • PLAY BACK
- 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