Copyright © 1995-2015 Nikkei Business Publications, Inc. All rights reserved.
All editorial content and graphics on this Web site may not be reproduced in whole or in part without the express permission of the copyright owner
NTT Makes '1,000x Faster' Variable Focus Lens
The KTN-based variable focus lens element. A single unit works as a cylindrical lens. It looks opaque because the transparency of KTN varies with the temperature. And the photo was taken at a temperature at which it does not become transparent.