Monday, January 26, 2015
Search
  
Submit your own News for
inclusion in our Site.
Click here...
Breaking News
Microsoft Reports Second Quarter Results
Smart TVs Could Be Hackers' Next Target
Oculus Forms Virtual-reality Film Studio
Dell Launches Malware Protection and Detection Service
Motorola Returns To The Chinese Market with Three New Phones
LG Display Buys Rights To Use New OLED Technology
Turkish Court Orders Facebook to Remove Pages Insulting Mohammad
Malaysia Airlines And Russian Dating Sites Topface Websites Hacked
Active Discussions
Sound card for my Laptop
full screen wide screen
Hi
About the restriction problem of chapter quantity in DVD
Booktype utilities for LiteON and OEM DVD Recorders
downgrade a nero vision 5 project to nero vision 2
what is the minimum burning speed
GSA-4163B and bitsetting
 Home > News > Optical Storage > Sony Sh...
Last 7 Days News : SU MO TU WE TH FR SA All News

Wednesday, October 18, 2006
Sony Showcases New Holographic Recording System


Sony presented its achievements on data reading/writing with the use of the "Micro-Reflector recording" technology, a type of holographic recording that could bring holographic storage systems closer to commercialization.

Micro-Reflector recording

A laser light emitted from a blue violet semiconductor laser diode is split into two so that one irradiates the front side of a volumetric optical disc medium as a reference light, while the other is emitted to the back side as a recording light. By precisely aligning the focal points of the two laser beams using servo technology, the two counter-propagating light beams focus on the same point on the disc's holographic recording material. Their interference creates a diffraction-limited size fringe corresponding to a 1 bit.



When a laser light (reproduction light) is emitted on the front side of the medium having interference fringes, the recording light is reproduced. This light advances from the fringes to the medium front side as if the fringes reflect the reproduction light. This is why the system is called "Micro-Reflector recording".


The volumetric optical disc comprises a 0.3 mm thick photopolymer, sandwiched between 0.6 mm glass substrates. Since the depth of the interference fringes can be controlled by changing the depth of the focal points of the laser lights, multi-layer recording with 10-20 layers can be provided. The recorded interference fringes are small enough to prevent the photopolymer from expanding and contracting due to temperature changes. This eliminates the need for adjusting the wavelength of the laser in accordance with the temperature - a problem commonly faced in Holographic storage technologies. Hence, Sony's recording system can use a common, commercially available blue-violet semiconductor laser diode. Moreover, the system does not require the use of other components such as spatial light modulators, CMOS sensors or other parts, making its cost lower than other Holographic recording systems.

Sony demonstrated read/write operations using an optical system with a wavelength of 405 nm and a numerical aperture (NA) of 0.5. The system involves 17 PP modulation, already implemented by the the Blu-ray Disc. Sony recorded data on a single layer at a recording density of 1.25 GB in a 12 cm-disk. The company says that it aims to achieve multilayer recording by increasing the numerical aperture.


Previous
Next
Firms say Microsoft fails to keep EU bargain        All News        Transcend releases its High-Capacity USB 2.0 Flash Drive, the 16GB JetFlash 2A
Konica Minolta and Plasmon Form Strategic Alliance to Market Plasmon's UDO Archive Storage Solutions     Optical Storage News      Panasonic Develops Four-layer Blu-Ray Recordable Disc

Get RSS feed Easy Print E-Mail this Message

Related News
Sony is Offering Old Games To Settle The 2011 PlayStation Network Breach
Sony Unveils New Line of Blu-ray Disc Players
Sony at 2015 International CES
'The Interview' Now Avaiable on iTunes
Vaio to Compete Against Sony
Sony Releases The Interview Online
Sony To Release The Interview Movie After All
North Korea Suggests Joint Inverstigation With U.S. Over Sony Hacking
FBI Confirms North Korea Was Behind Sony Hack
North Korea Linked To Recent Sony Hacking
Sony Global Education Established
Sony Film Debut Canceled After Threats

Most Popular News
 
Home | News | All News | Reviews | Articles | Guides | Download | Expert Area | Forum | Site Info
Site best viewed at 1024x768+ - CDRINFO.COM 1998-2015 - All rights reserved -
Privacy policy - Contact Us .