Why is it named Blu-ray?
The name Blu-ray originates from the core technology, which employs a blue-violet laser that reads and writes data. The name is a combination of “Blue”, for the blue-violet laser, and “Ray”, for the optical ray. The Blu-ray Disc Association states that the spelling of “Blu-ray” is not a mistake, and that the letter “e” was intentionally left out so that the name could be registered as a trademark.
