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科技前沿:隐身衣的实现指日可待(图)

http://www.sina.com.cn 2008年11月05日 10:14   英语周报大学版
科技前沿:隐身衣的实现指日可待(图)
隐身衣的实现指日可待

  Scientists closer to developing invisibility cloak

  2008-2009学年 第4期

  李贤 译

  WASHINGTON—Scientists say they are a step closer to developing materials that could render people and objects invisible.

  Researchers have demonstrated for the first time they were able to cloak three-dimensional objects using artificially engineered materials that redirect light around the objects. Previously, they only have been able to cloak very thin two-dimensional objects.

  The findings, by scientists at the University of California, Berkeley, led by Xiang Zhang, are to be released later this week in the journals Nature and Science.

  The new work moves scientists a step closer to hiding people and objects from visible light, which could have broad applications, including military ones.

  People can see objects because they scatter the light that strikes them, reflecting some of it back to the eye. Cloaking uses materials, known as metamaterials, to deflect radar, light or other waves around an object, like water flowing around a smooth rock in a stream.

  Metamaterials are mixtures of metal and circuit board materials such as ceramic, Teflon or fiber composite. They are designed to bend visible light in a way that ordinary materials don’t. Scientists are trying to use them to bend light around objects so they don’t create reflections or shadows.

  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.(AP)

  参考译文:

  华盛顿消息:科学家们称,他们距发明能使人和物体隐身的材料更近了一步。

  利用人造的工程材料使物体周围的光线发生变向,研究者们首次证明了他们能够使三维物体隐身。先前,他们只能使非常薄的二维物体隐身。

  研究结果由加利福尼亚大学伯克利分校的科学家们得出,张项是带头人。本周晚些时候,这些结果将在《自然与科学》杂志上发表。

  这项新的研究工作使科学家们对于实现人和物体在可见光中隐身的计划更近了一步。隐身技术的应运领域将会很广泛,包括军事领域。

  人们能够看到物体,是因为物体会将照射到其表面的光线分散开,并反射其中的部分光线到人的眼睛里。隐身所用的材料,是一种特异材料,可以使一个物体周围的雷达、光线或其它光波发生变向,就如河流中的水从一块光滑岩石周围流过一样。

  特异材料是金属和电路板材料如陶瓷、特氟隆或纤维合成物的混合物。它们被设计用来以普通材料不具有的方式偏斜可见光。科学家们正试图用它们来让物体周围的光线发生变向,从而不能形成反射或阴影。

  它不同于隐形技术,隐形技术不会让一架飞机消失于无形,只是减少可被雷达探测到的切面使其难以被追踪到。

  汉译题目:隐身衣的实现指日可待

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