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美英科学家成功研制“隐形斗篷”

作者: 温州翻译公司 发布时间:2017-05-07 17:29:12  点击率:

哈里·波特的“隐形斗篷”曾让人类羡慕不已。最近,美英科学家研制成功的“隐形斗篷”,让现实世界看到了科幻世界中魔法变成现实的希望。美国和英国科学家最近合作研发出一种“隐形斗篷”,可以避开微波探测,成功将一个铜质圆柱体“隐藏”起来。在首次尝试中,研究人员设计的“外衣”能够阻止探测到物体的微波。这种隐形原理与军事称谓中的“隐形战斗机”不同,“隐形战斗机”并不能让物体真正隐形,只是通过减少雷达可以探测到的战机横截面而降低暴露的风险。不过,研究人员对这次研究成果并不十分满意,认为目前的“斗篷”隐形效果仍处于二维阶段,在实验中还可能留下微弱阴影。r2G温州翻译公司-忠信乐译翻译有限公司

 

 r2G温州翻译公司-忠信乐译翻译有限公司

 
 
 

A photo of the "metamaterial" cloak, released to Reuters on October 19, 2006, which deflects microwave beams so they flow around a "hidden" object inside with little distortion, making it appear almost as if nothing were there at all. U.S. and British scientists said on Thursday they had found a way to hide an object from microwave radiation in a first step toward making a what they hope will be an invisibility cloak. [Reuters]
r2G温州翻译公司-忠信乐译翻译有限公司

Scientists are boldly going where only fiction has gone before - to develop aCloak of Invisibility. It isn't quite ready to hide a Romulan space ship from Capt. James T. Kirk or to disguise Harry Potter, but it is a significant start and could show the way to more sophisticated designs. r2G温州翻译公司-忠信乐译翻译有限公司

In this first successful experiment, researchers from the United States and England were able to cloak a copper cylinder.r2G温州翻译公司-忠信乐译翻译有限公司

It's like a mirage , where heat causes the bending of light rays and cloaks the road ahead behind an image of the sky.r2G温州翻译公司-忠信乐译翻译有限公司

"We have built an artificial mirage that can hide something from would-be observers in any direction," said cloak designer David Schurig, a research associate in Duke University's electrical and computer engineering department.r2G温州翻译公司-忠信乐译翻译有限公司

For their first attempt, the researchers designed a cloak that preventsmicrowaves from detecting objects. Like light and radar waves, microwaves usually bounce off objects, making them visible to instruments and creating a shadow that can be detected.r2G温州翻译公司-忠信乐译翻译有限公司

Cloaking used special materials to deflect radar or light or other waves around an object, like water flowing around a smooth rock in a stream. It differs from stealth technology, which does not make an aircraft invisible but reduces the cross-section available to radar, making it hard to track.r2G温州翻译公司-忠信乐译翻译有限公司

The new work points the way for an improved version that could hide people and objects from visible light.r2G温州翻译公司-忠信乐译翻译有限公司

Conceptually, the chance of adapting the concept to visible light is good, Schurig said in a telephone interview. But, he added, "From an engineering point of view it is very challenging."r2G温州翻译公司-忠信乐译翻译有限公司

The cloaking of a cylinder from microwaves comes just five months after Schurig and colleagues published their theory that it should be possible. Their work is reported in a paper in Friday's issue of the journal Science.r2G温州翻译公司-忠信乐译翻译有限公司

"We did this work very quickly ... and that led to a cloak that is notoptimal ," said co-author David R. Smith, also of Duke. "We know how to make a much better one."r2G温州翻译公司-忠信乐译翻译有限公司

The cloak is made of metamaterials, which are mixtures of metal and circuit board materials such as ceramic, Teflon or fiber composite.r2G温州翻译公司-忠信乐译翻译有限公司

In an ideal situation, the cloak and the item it is hiding would be invisible. An observer would see whatever is beyond them, with no evidence the cloaked item exists.r2G温州翻译公司-忠信乐译翻译有限公司

(Agencies)r2G温州翻译公司-忠信乐译翻译有限公司

r2G温州翻译公司-忠信乐译翻译有限公司

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