1, Blu-ray or Blu-ray Disc (abbreviated as BD) uses a blue laser with a short wavelength (405nm) to read and write data, hence the name.
2. Up to now, Blu-ray is the most advanced large-capacity optical disc format with a capacity of 25G or 50G. In terms of speed, the single 1X rate of Blu-ray is 36Mbps, that is, 4.5MB/S, allowing the recording speed of 1x ~ 12x, and the recording speed of 4.5MB/S~54MB/S per second. At present, Blu-ray discs on the market have 2X, 4X and 6X recording rate specifications.