Close

Search

Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
SPECIAL ANNOUNCEMENT
2016 Photonics Buyers' Guide Clearance! – Use Coupon Code FC16 to save 60%!
share
Email Facebook Twitter Google+ LinkedIn Comments

Sony Puts Blue-Green Laser to Work

Photonics Spectra
Dec 1997
Sony has announced an optical disc recording system that employs a blue laser for high-density data storage.
The 12-GB model uses a 515-nm blue-green laser unveiled by Sony in January 1996. A high-NA (0.85) lens focuses the beam on a 12-cm optical disc, where it records or reads a 0.1-mm phase-change layer. The phase-change material is a germanium antimony tellurium alloy that crys- tallizes and decrystallizes to record and erase the data.
Sony was able to achieve 4.5 hours of recording time at a total transfer rate of 6 Mb/s, which meets industry standards for high-quality television products.


Comments
Terms & Conditions Privacy Policy About Us Contact Us
back to top

Facebook Twitter Instagram LinkedIn YouTube RSS
©2016 Photonics Media
x Subscribe to Photonics Spectra magazine - FREE!