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SSS 2011-07-08

时间:2011-08-09 03:34来源:互联网 提供网友:gmeng   字体: [ ]
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 Cameras were once big and bulky. Today,really good cameras fit in your pocket. And now, researchers at Cornell havedeveloped a camera that’s just a half-millimeter on each side and a hundredthof a millimeter thick.

 
The lens-less device is called a PlanarFourier Capture Array. It’s a flat piece of doped silicon1. Each of its pixelsis sensitive to specific incident angles and supplies a component2 of the mathematicaloperation called the Fourier Transform to produce an image about 20 pixelsacross. The details of the new camera are outlined in the journal OpticsLetters. 
 
Animals like the nautilus manage withlens-less eyes. The images aren’t necessarily sharp, but they’re still useful.Same with this tiny camera. 
 
Patrick Gill, who headed the project, had been trying to create a lens-lessimplantable device to detect brain neurons that, due to modifications3, glowwhen they’re active.
 
The camera his team came up with could costjust pennies to produce, and could find use in surgery, research and robotics.An insect-sized robot with tiny silicon cameras could tell light from dark andperceive general shapes. After all, the flatworm planaria does just fine with eyesthat are arguably not as good.
 
Thanks for the minute. For ScientificAmerican’s 60-Second Science. I'm Cynthia Graber .

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1 silicon dykwJ     
n.硅(旧名矽)
参考例句:
  • This company pioneered the use of silicon chip.这家公司开创了使用硅片的方法。
  • A chip is a piece of silicon about the size of a postage stamp.芯片就是一枚邮票大小的硅片。
2 component epSzv     
n.组成部分,成分,元件;adj.组成的,合成的
参考例句:
  • Each component is carefully checked before assembly.每个零件在装配前都经过仔细检查。
  • Blade and handle are the component parts of a knife.刀身和刀柄是一把刀的组成部分。
3 modifications aab0760046b3cea52940f1668245e65d     
n.缓和( modification的名词复数 );限制;更改;改变
参考例句:
  • The engine was pulled apart for modifications and then reassembled. 发动机被拆开改型,然后再组装起来。 来自《简明英汉词典》
  • The original plan had undergone fairly extensive modifications. 原计划已经作了相当大的修改。 来自《简明英汉词典》
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