There are two kinds of solid image sensors: Charge Coupled Device (CCD) and CMOS sensor. The paper analysis the characteristic of two kind sensors and the CCD is chosen to use.

在固体图像传感器中主要有两种固体传感器：电荷耦合器件CCD和CMOS图像传感器，就这两种传感器的性能本文进行了讨论，最终选用了CCD图像传感器。

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The key difference is that instead of focusing the light on a strip of photochemical film as in traditional cameras, digital cameras use an image sensor, called a charge coupled device (CCD), to capture the image.

FORBES: Technology briefing