It sounds like science fiction, and perhaps it is: Researchers have found a way to generate invisible 3-D shapes in the air that can be felt by human hands. The technology, whose main use case is letting surgeons physically “feel” anomalies such as tumors in CT scans, could also revolutionize everything from advertising to architecture.
Detection of targets in bubbly waters are key goals of shallow-water sonar.
Scientists at the University of Southampton have developed a new kind of underwater sonar device that can detect objects through bubble clouds that would effectively blind standard sonar.
evanescent waves are transmitted by the new 3-D holey-structured metamaterial
University of California, Berkeley, scientists have found a way to overcome one of the main limitations of ultrasound imaging — the poor resolution of the picture
The acoustic hyperlens is fashioned from 36 brass fins arranged in the shape of a hand-held fan.
Ultrasound and underwater sonar devices could “see” a big improvement, thanks to development of the world’s first acoustic hyperlens. Created by researchers with the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab), the acoustic hyperlens provides an eightfold boost in the magnification power of sound-based imaging technologies. Continue reading… “First Hyperlens For Sound Waves Created”
Above: CCD image sensor. Below: Optical fibers.
The Royal Swedish Academy of Sciences has decided to award the Nobel Prize in Physics for 2009 with one half to Charles K. Kao, Standard Telecommunication Laboratories, Harlow, UK, and Chinese University of Hong Kong “for groundbreaking achievements concerning the transmission of light in fibers for optical communication”, and the other half jointly to Willard S. Boyle and George E. Smith, Bell Laboratories, Murray Hill, NJ, USA “for the invention of an imaging semiconductor circuit – the CCD sensor”.
The power of light microscopes to resolve fine details has just doubled. A new technique can distinguish tiny structures inside cells, in colour and 3D, even if they are only 100 nanometres apart.