Thursday, July 24, 2014
Search
  
Submit your own News for
inclusion in our Site.
Click here...
Breaking News
Sony Settles 2011 PSN Hacking Case
Sony Xperia Z3 Specs Leaked
Swatch Denies Working with Apple on iWatch
Vuzix And Lenovo Launch M100 Smart Glasses Product
Google Implemented "Right To Be Forgotten" Ruling Inadequately, EC says
Researchers Create Ultra-dense Memory Using Conventional Methods
Facebook Profit Doubles
Qualcomm's Profit Hurt by Dispute Over China Royalties
Active Discussions
help questions structure DVDR
Made video, won't play back easily
Questions durability monitor LCD
Questions fungus CD/DVD Media, Some expert engineer in optical media can help me?
CD, DVD and Blu-ray burning for Android in development
IBM supercharges Power servers with graphics chips
Werner Vogels: four cloud computing trends for 2014
Video editing software.
 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 Settles 2011 PSN Hacking Case
Sony Xperia Z3 Specs Leaked
Sony Invests in Image Sensor Production
Sony Failed To Pay Web Hosting Bills
New Sony Software Upgrade For Xperia T2 Ultra
Sony Xperia Z2 Tablet Comes Exclusively On The Verizon Wireless Network
Sony Launches The Xperia C3 For Selfies
Sony Recalls VAIO Flip PC Laptops Due to Fire Hazards
VAIO Computers Return To The Japanese Market
Sony and Vue Entertainment To Offer First live 4K Streamings of FIFA World Cup Matches
Sony Pictures Television To Buy CSC Media Group
Sony Releases New Portable Gadgets

Most Popular News
 
Home | News | All News | Reviews | Articles | Guides | Download | Expert Area | Forum | Site Info
Site best viewed at 1024x768+ - CDRINFO.COM 1998-2014 - All rights reserved -
Privacy policy - Contact Us .