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Designed beam capable of making small objects invisible
Singaporean scientists have created a rather unusual device capable of microscopic objects to hide from prying eyes. For this purpose the beam, which scientists call a “ray of darkness.” It creates light around an object void through which the object becomes invisible.
The idea of scientists from the National University of Singapore is quite simple. It is based on the fact that when the subject is in focus, it is seen clearly and with some boundaries. Unfocused edge sharpness is reduced and the middle remains bright. Researchers have taken as a basis and a super resolution technique using a lens system to create a failed portion of the space in which the light intensity is close to zero, – if no light and, in this point, it is impossible to see anything. The result is a light empty capsule antirazresheniem named because it is the opposite of super resolution.
This phenomenon is called dispersion function point (point spread function, PSF). This function is very characteristic graph with a central high peak which corresponds to a clear and bright central portion of the object and two side lobes on both sides of the central peak, which correspond to blurred image area.
According to the scientists, led by Wang Chao (Chao Wan) they managed to hide 40-nanometer letter N on the specific wave length of 630 nm. It also reported that lens, modifying emission laser , easy to manufacture and, in fact, is a transparent plate with concentric circles of standard dielectrics.
Although progress in this direction while not far, this system has a great prospect in the future, as it shows a completely different way to create invisibility . In the future we plan to create a device that can hide from human eyes have great facilities.
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Tags: Lasers , invisibility cloak , Future Technology .
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