Toyoda Gosei announces blue-violet laser....
nni.nikkei.co.jp
Thursday, April 19, 2001
Toyoda Gosei Unveils Blue-Violet Laser Diode Technology
NAGOYA (Nikkei)--Toyoda Gosei Co. (7282) announced Thursday it has developed the technology to make blue-violet laser diodes.
These lasers use the shorter end of the visible light spectrum -- in the blue-to-violet range -- to raise the surface recording density of optical disks, and have wave-length of 410 nanometers (a nanometer is one-billionth of a meter).
Current disk-reading lasers use the longer red end of the spectrum. The shorter end, which is the narrower part of the beam, enables more data to be recorded and/or read.
The new diodes have an output of 3 milliwatts, far more than diodes currently in use, and can be used for 5,000 hours straight.
The rubber parts manufacturer plans to ship samples of the diodes in autumn, with commercialization commencing soon thereafter.
The diodes show promise in future applications, such as high-speed laser printers and DVDs, as they are capable of storing large quantities of data.
(The Nihon Keizai Shimbun Friday morning edition) |
