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Prvo snemanje filma na holografskem disku kapacitete 1 Terabajt

Prvo snemanje filma na holografskem disku kapacitete 1 Terabajt

Hammer ::

Optware Corp., the developer of Collinear Holographic* Data Storage System, announced today that it had achieved successfully world's first recording and play back of digital movies on a holographic recording disc with a reflective layer using Optware's revolutionary Collinear Holography. This is a major milestone for commercializing holographic data storage system.
The recorded movies were played back in a series of meetings from July eight through 12 with Optware's six existing investors as well as eight enterprises both
domestic and overseas including leading manufacturers of electronic and electric products for consumer, business and industrial use. Company names are not disclosed.


Recording holographic page data** on a rotating transparent disc has been reported before. Such discs, however, are foreign to the conventional optical discs. Lacking the servo information, they do not seem to have a commercial viability.
On the contrary Optware has proposed Collinear Holographic recording on a hologram disc the structure of which follows conventional optical disc, i.e. preformatted disc with a reflective layer (disc with servo information).
This type of disc has been said to be inadequate because preformatted address pits generate diffusion noise during read / write, thus deteriorate the signal quality.
Optware has overcome this problem by applying a dichroic mirror layer between the recording and reflective layers. This dichroic mirror layer blocks the diffusion by the address pits, allowing ideal collinear holographic recording.

Optware's demonstration is an epoch-making event in a sense that it proved the successful integration of optical disc technology and holographic recording technology.

Fig.1 Optware's Holographic Versatile Disc™ (HVD™) disc structure.
Fig.2 Read / Write system
Fig.3 Holographic Versatile Disc™ (HVD™) on which digital movies were recorded (left). The disc diameter of 12 centimeters is equivalent to those of CD and DVD.
Fig.4 The surface of the Holographic Versatile Disc™ (HVD™). Multiplexed holographic data patterns are seen along the tracks.


Holographic recording technology records data on discs in the form of laser interference fringes, enabling existing discs the same size as today's DVDs to store as much as one terabyte of data (200 times the capacity of a single layer DVD), with a transfer speed of one gigabyte per second (40 times the speed of DVD). This approach is rapidly gaining attention as a high-capacity, high-speed data storage technology for the age of broadband.

* The collinear holography technique
Optware's exclusive development of the collinear holography technique is part of its effort to make holographic recording technology practical. A patented technology originally proposed by Optware founder and chief evangelist Hideyoshi Horimai, collinear holography combines a reference laser and signal laser on a single beam, creating a three-dimensional hologram composed of data fringes. This image is illuminated on the medium using a single objective. Using this breakthrough mechanism, Optware dramatically simplified and downsized the previously bulky and complicated systems required to generate holograms. Further enhancements were achieved with Optware's exclusive servo system. The introduction of this mechanism enabled reduced pickup size, elimination of vibration isolators, high-level compatibility with DVD and CD discs and low-cost operation, effectively obliterating the remaining obstacles to full commercialization.

** Page data
Two dimensional bit map image to be recorded and played back by hologram. Data to be written is first encoded to a series of page data, then recoded holographically.

Vir
Uradna stran

Izgleda, da se nam obeta revolucija na področju shranjevanja podatkov na prenosne medije. >:D

Highlag ::

In zakaj ni to na prvi strani Slo-Techa? :\
Never trust a computer you can't throw out a window

OldSkul ::

OMFG, 1TB, PA TO JE OGROMNO.Upam, da bodo to hitro uvedli in, da ne bo ostalo samo pri prototipu.

Zgodovina sprememb…

  • spremenil: OldSkul ()

jype ::

1 tera je ogromno? :)

Hja, za medij take velikosti ni malo, ampak je cisto logicni korak naprej. Upam, da jim bo uspelo.

Sicer pa lahko kupis ze 1.6TB firewire/usb disk, ki je sicer disk (v bistvu ni opticni medij), ampak sluzi "prenosnemu" namenu.

neres ::

Zelo zanimivo.

"Lacking the servo information, they do not seem to have a commercial viability." - mi lahko kdo pove bolj po domače za kaj se gre tukaj?

Jux ::

Očitno so že prej poiskušali izdelati holografske diske, vendar stvar ni bila uspešna ker je manjkala servo informacija. Problem pri vseh diskih, ki se vrtijo je v zadostni natančnosti pozicioniranja bralne glave - gostota zapisa je ogromna (pri optičnih diskih je širina vdolbinice lamda/2 - torej polovico valovne dolžine svetlobe) in zadeti tako stvar je težko, še težje pa vrteti disk in ciljati miljarde takih majhnih vdolbinic. Zato vsi moderni mediji vsebujejo nek način shranjevanja servo informacije, ki omogoča da glava sproti korigira položaj bralne(bralnopisalne) glave.

Očitno vsi prejšni poiskusi zapisa holografske informacije niso bili uspešni prav zaradi pomanjkanja servo informacije - ta nov način pa (kar vidiš na shemi ena, kjer je narisana shema) uporablja za servo informacijo kar način ki ga uporabljajo tudi CD mediji, torej da zapišejo nek vzorec na cd ploščo (to uporabijo za servo informacijo) nad ta vzorec pa postavijo nek snemalni polimer v katerega zapisujejo informacijo.

Podoben sistem so včasih uporabljali diski, saj so imeli eno površino (torej eno stran ene plošče) namenjeno zapisu servo informacije, na ostalih pa so shranjevali podatke. (glave so v navpični smeri povsem poravnane). Ta sistem je funkcioniral dokler niso dosegli tako velike gostote, da takšen zapis servo informacije ni bil zadosten (dovolj natančen). Danes v ta namen uporabljajo servo zapis skrit v presledkih med sledmi na disku in pravzaprav me zanima, zakaj istega principa niso uporabli tudi tu (verjetno je razlog v preprostosti in ceni izdelave rešitve ki jo uporabljajo sedaj). Ni pa dvakrat za reči, da prej ali slej ne preidejo na isti način shranjevanja servo podatka - seveda ko (če) bo potreba po njem.

Upam da nisem preveč dolgovezil.

PS: zakaj ta novica ni na prvi strani?
web&blog&etc: http://lukabirsa.com

Zgodovina sprememb…

  • spremenil: Jux ()

Hammer ::

@Highlag , @Jux novico sem jaz mislil spisat oziroma opozorit pisune vendar sem enkrat nekaj narobe naredil in več nimam dostopa do pošlji novico.

Zgodovina sprememb…

  • spremenil: Hammer ()

Highlag ::

Žal :\

ST rabi kakšne dobre novice. :\
Never trust a computer you can't throw out a window

neres ::

Samo jaz se sprašujem če je res prihodnost v takem(CD) mediju, ki je precej dovzeten za poškodbe. Se ti malo opraska in adijo 1TB podatkov...

Pa še malo neroden je za vstavljanje, usb (mini) diski so dosti hitrejši in enostavnejši, npr.

Edino kompatibilnost s CDji in DVDji ga tukaj rešuje.

Sicer pa proizvajalce teh medijev najbrž ne moti, da bodo morali prodajati dodatne enote.


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