A few years ago, scientists discovered another type of light-sensitive cell in the eye.

几年前，科学家在眼睛里发现了另一种类型的光敏感细胞。

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Electronic engraving Printing plate engraving with a stylus controlled by a light sensitive cell scanning the original.

电子雕刻用光扫描器扫描原稿，然后由光电池控制的钢针雕刻，造成印版。

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The near-infrared photoactive polymer absorbs more near-infrared light but is less sensitive to visible light, balancing solar cell performance and transparency in the visible wavelength region.

ENGADGET: UCLA creates transparent solar cell, dreams of current generating windows