Researchers at the Tokyo University of Science Graduate School of Engineering Science have developed a technology that could lead to a holographic storage disc with a capacity equivalent to 2TB - about 400 DVDs.
The "hologram memory" technology enables data to be written in three dimensions rather than simply etching data on the surface of discs.
The concept is not new, as many companies had created holographic storage prototype systems during the last 15 years, but they almost never reached the market.
A special material on the optical disc interacts with a laser beam light and hardens. That allows for the storage of data in a 3D column form deep under the surface of the disc. By slightly changing the angle at which the laser beam hits the surface, multiple copies of a collection of data can be stored in a single location in the disc.
Manabu Yamamoto, a professor at the university's applied electronics department who led the research team, says that the system uses a "3D cross-shift multiplexing method". A series of holograms are recorded with shift multiplexing and rotating recording material with the axis of rotation being perpendicular to the material's surface.
Expectations were originally high for hologram memory because it would allow the storage of huge volumes of data. However, the technology was affected by even the slightest vibrations when entering data. The problem was overcome by changing how the laser beam was projected onto the surface. That led to the possibility of storing about 2 terabytes of data on a disc the same size as a DVD.
The highly sensitive optical disc compatible with the system was developed by Mitsubishi Chemicals.
Yamamoto said the technology could be commercialized in about three years, although a company capable of developing the drive's mechanism should be found.
The hologram memory could be used for for facilities that store large volumes of data, such as videos, for long periods.
http://cdrinfo.com/Sections/News/Details.aspx?NewsId=44821wow, that is very, very cool.
CD is only about 700 MBytes, dual layered DVD is only 8.5 GBytes, dual layered Blu-Ray disc is 50 Gbytes, and triple layers Ultra HD Blu-Ray disc is 100 GBytes max, but this Holographic Versatile Disc has a storage capacity of 2 TBytes or 2 Terabytes which is 40 times more storage capacity than dual-layered Blu-Ray discs. wow.
not sure what the bitrate per second is but with that storage capacity, its possible to store 480i or 480p uncompressed or lossless compression. And possibly 1080p with little to no compression. Not only that, but it can store 4K, 5k, 8k, and possibly 10k with little to some lossy compression required. Amazing.
Topic: Tokyo University Of Science Develops 2TB Holographic Optical Disc (Read 2373 times)