说明：  摄像头的工作原理大致为：景物通过镜头(LENS)生成的光学图像投射到图像传感器面上，然后转为电信号，经过A/D(模数转换)转换后变为数字图像信号，再送到数字信号处理芯片(DSP)中加工处理，再通过USB接口传输到电脑中处理，通过显示器就可以看到图像了
(The working principle of the camera is roughly: the scenery through the lens (LENS) optical image onto the image sensor surface generation, then turn into electrical signals, after A/D (ADC) converted into digital image signal, and then sent to the digital signal processing chip (DSP) in the processing, and then through the USB interface to the in computer processing, you can see the image through the display)