At first glance, the boxy "eternal camera" looks like an old daguerreotype device. But appearances are deceiving. This is something new-a camera that powers itself. The computer vision lab at Columbia University, led by computer scientist Shree K. Nayar, created this everlasting camera by making photodiodes-devices that convert light into electricity -do double duty. In digital cameras, photodiodes measure light. In solar panels, they harvest energy. The eternal camera's photodiodes do both jobs. This enables the camera to generate enough power to take photos forever-as long as there's light available.
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机译：乍一看，方形的“永恒相机”看起来像是一种旧的刻版印刷设备。但是外表是骗人的。这是新事物-可以自行供电的相机。由计算机科学家Shree K. Nayar领导的哥伦比亚大学计算机视觉实验室，通过制造光电二极管设备（将光能转换为电能）进行双重工作，创造了这款永恒的相机。在数码相机中，光电二极管可测量光。在太阳能电池板中，它们收集能量。永恒相机的光电二极管可以完成这两项工作。只要有光，这就能使相机产生足够的能量来永远拍摄照片。
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