FERMATA, a.s. offers full service in the production of Blu-ray Discs
Blu-ray discs are the third generation of optical data carriers that are used to store digital data. Unlike the current DVD technology that is based on the red laser, the Blu-ray technology uses blue laser, which enables to achieve a higher capacity. The name of the carrier is derived from the colour of laser.
The size of Blu-ray disc is 12 cm in diameter and 1.2 mm in thickness. Blu-ray discs can have 8 cm in diameter, same as CD and DVD discs.
Data are stored in a shape of a spiral 0.1 mm below the surface of the disc. The track distance is 0.35 μm. To read Blu-ray discs laser light of 405 nm wavelength is used. Blu-ray image resolution is HD, i.e. High Definition, which allows the reproduction of recordings in HDTV signal quality that is required for LCD and plasma screens with large diagonal. The image is stored as a series of images in 1280 x 720 pixels or 1920 x 1080 pixels definition. Those video modes are referred to as 720p and 1080i/p. Video length of two-layer Blu-ray disc is about 23 hours in SD definition, about 8.5 hours (HD, MPEG-4 / VC1) definition and about 5.6 hours (HD, MPEG-2).
Blu-ray enables sound addition with uncompressed audio that can be up to eight-channel and have various formats.
Capacity of Blu-ray discs with a diameter of 12 cm
Capacity of mini Blu-ray discs (8 cm)
Blu-ray disc (BD) formats
BD-ROM – read-only disc, pressed disc
BD-R – disc for single writing
BD-RE – rewritable disc
3 regions have regional film codes on Blu-ray discs:
A/1 – America, Japan, North Korea, South Korea , Taiwan, Hong Kong and Southeast Asia
B/2 – Europe, Africa, Australia, New Zealand, Saudi Arabia and the Middle East
C/3 – India, Russia, Central and South Asia