The first author on the paper explains

in new network on 10 July, according to Chinese national defense science and technology information network Cheap Texans Hats reported, Karlsruhe Institute of Technology (KIT) scientists successfully developed a tactile invisibility cloak, can let the fingers or measuring instruments can't feel the hidden objects.

this tactile contact metamaterial cloak made from polymer production. The main performance is decided by the special structure. "We need to construct the structure around the hidden objects. In this structure, strength depends on the position." The first author on the paper explains, "the precise combination of components and the arrangement is one of Cheap Chargers Hats the biggest obstacles for the development of mechanical cloak". This metamaterial is according to the crystal structure of sub micron precision structure. Needle bevel it contacted by the needle. The point of contact for accurate calculation of the size, mechanical properties to meet the required. In this way, the structure constructed by fingers or measuring instruments can't feel.

in this sense the invisibility cloak at the bottom of the insertion of a rigid cylinder. Any object can be placed in a cylindrical cavity. If the foam or layers of cotton will be placed in the cylinder, the cylinder will be hard to the touch. But the metamaterial structure requires Cheap Rams Hats only a thin layer, can guide the touch of the finger strength, let the cylinder completely hidden. "It's like a fairy tale the princess on the pea inside the mattress, although Cheap 49ers Hats is very thick, the princess could feel the pea. In our material, need only a thin layer, can let the princess slept well."

the realization of such a machine the invisibility cloak is quite complex. Mechanical properties define the required, from the Cheap Titans Hats basic equations of mathematical physics backward, so as to obtain surplus material structure. Using this method, there can be no structural in nature materials. Such as compressive but not shear the solid. Super material prepared by spinoff Nanoscribe KIT of direct laser writing. It achieves accuracy over the full sample length of several millimeters.

mechanical invisibility cloak represents the physical basis of pure research, may lead to many interesting, because it allows the freedom of choosing material mechanical properties. For example, very thin, but still comfortable camping pad or the cable can be hidden beneath the blankets, pipeline.

(original title: Germany developed tactile invisibility cloak can let your fingers to feel failure)