Blu-ray Disc is a next-generation optical disc format that can store high-definition video and large amounts of data using a blue-violet laser. The name comes from the blue-violet laser used and the small pit size of 0.15 microns allows for higher density data storage than DVDs. Blu-ray Discs use a hard coating to protect the data layer and make them more durable than CDs and DVDs. The increased data capacity and smaller laser wavelength allow Blu-ray Discs to store around 5 to 10 times more data than DVDs.
4. HISTORY Blu-ray, also known as Blu-ray Disc (BD) is the name of a next-generation optical disc format. Developed to enable recording, rewriting and playback of high-definition video (HD), as well as storing large amounts of data. The name Blu-ray is derived from the Underlying technology, which utilizes a blue-violet laser to read and write data
5. HISTORY The name is a combination of "Blue" (blue-violet laser) and "Ray" (optical ray) According to the Blu-ray Disc Association IN the spelling of "Blu-ray“,the character "e" was intentionally Left out so the term could be registered as a trademark.
11. STRUCTURE OF BLU-RAY DISC SO IN BLU-RAY DISC PIT SIZE -0.15 MICRONS (MORE THAN TWISE AS SMALL AS THE PITS ON DVD. TRACK-PITCH IS 0.32 MICRONS Laser needed : blue-violet laser (405 nm) Data transfer rate: 36Mbps
12. CD VS. DVD VS. BD BD (3RD GENERATION) DVD (2ND GENERATION) CD (1ST GENERATION)
13. CD VS. DVD VS. BD BD Disc will increase DVD capacity by 5 to 10 times. usage of a blue instead of a red laser improve lens specifications, allowing for a much smaller focus laser beam which enables the recording of much smaller and higher density pits on the disc