12cm Blu-ray disc-ILHA Formasa
Blu-ray disc is the next generation of optical disc after DVD, and it is used to store high definition video and high capacity data.
The name of Blu-ray disc comes from its using of 405 nm blue-ray laser for reading or recording.
The capacity of a single layer Blu-ray disc is 25GB, and it is enough to record a 4 hour high definition video.