According to the research done by University of Rochester, in Rochester, NY they said that things can be “cloaked” or made invisible.
Since it works through four lenses not the some elaborate coat, they are referring to this device as “Cloak”
They have arrived with the cloaking device which can make things and people virtually disappear. The invisibility concept shown in movies like Hollow Man and Harry Porter seems to turn in reality in future.
As picture speaks itself, the object placed behind the cloaking device is virtually invisible.
PhD student at Rochester’s Institute of Optics. named Mr. Joseph Choi said “This is the first device that we know of that can do three-dimensional, continuously multidirectional cloaking, which works for transmitting rays in the visible spectrum,”
They use four lenses which are carefully calculated computed angles to make the oblect disappear which fall into this region.
Research performed by Howell and Choi have published how it works and they have used technique called ABCD matrices which describes how light bends while passing through the lenses and mirrors. It has been published in the Optic Express and also availbe on arXiv.org
This diagram illustrates a little more clearly just exactly how the "invisibility region" is created.