Blue Ray Disc
Everyone has know what’s CD (compact disc) and DVD (double layer video disc). Data storage media which disk form usually used to record file in any formats.. If during this time we are familiar with the Compact Disc (CD) and Double Layer Video Disc (DVD), so now we are faced with two of the latest technology from both media.
I am sure that Blue Ray Disc (BRD) will replace CD and DVD function. CD just save data up to 600-700 MB and DVD just 17.5 GB, therefore BRD capacity is greater than CD/DVD. The BRD capacity is 50 GB..!!!
Blue Ray technology use blue laser with wavelength 405 nm, while CD and DVD use a red laser, with wavelength 780 nm for CD, and 635-650 nm for DVD. Blue Ray uses 1 to 2 layers each his disc, which each layer able to accommodate 25 GB of data, so that the maximum capacity is 50 GB. On the CD has only one layer are only able to save 650-700 MB of data, while the DVD has 2 layers. Blue Ray has access speed 36 MB/s, faster than a CD that is only 1.2 MB/s and DVD with 11 MB s. Blue Ray technology has been implemented on the Sony Playstation 3, for use on the PC, the disc and his playera sold separately
FM Disc
Have not familiar with the Blue Ray now we have been given a new choice for media storage, the Fluorescent Multilayer Disc (FM Disc). This technology was initially developed by Constellation 3D, a company from U.S. who have laboratory in Israel and Russia.
FM Disc is result development from invention organic matter that is called "stable photocrome", a material when exposed to laser rays can emit light Fluoroscent.
(FM Disc)
One fundamental difference is when the CD and DVD surface scratches, the data will be difficult to read, whereas in FM Disc things do not happen. The contents will remain legible despite surface scratches or dirty. Due to the nature of light on the FM Disc is incoherent with the different CD and DVD that is coherent.
In terms of form, FM Disc has the form of CD, DVD and Blue Ray Disc (BSD), but transparent, not like there is a shiny layer of the previous generation. FM Disc has more layers, the capacity of 50 GB to 12 layers with the required speed of access is very fast to reach 1 GB / s.
For the initial stage, FM Disc technology is still using the red laser that is only able to accommodate approximately 140 GB of data. And for the next stage will use a blue laser with wavelength 480 nm, with the capacity to reach 10 TB (Terra Bytes). Capacity is indeed a very unusual large.
The presence of this new technology (Blue Ray Disc and FM) will shift technology (CD and DVD) that already exists. This will require a long process, we can only see up to now there is still use the floppy. But at least we now have many options in choosing media that we need.
