Close

Search

Search Menu
Photonics Media Photonics Buyers' Guide Photonics Spectra BioPhotonics EuroPhotonics Vision Spectra Photonics Showcase Photonics ProdSpec Photonics Handbook
More News

Sony Puts Blue-Green Laser to Work

Facebook Twitter LinkedIn Email Comments
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.

Photonics Spectra
Dec 1997
As We Go To PressBreaking NewsPresstime Bulletinlasers

Comments
back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2019 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA, info@photonics.com

Photonics Media, Laurin Publishing
x Subscribe to Photonics Spectra magazine - FREE!
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.