镜头:主要功能是把光线会聚到CCD(电荷耦合器件)上; CCD:其功能是把光信号转变为电信号; ADC(模数转换器):把模拟电信号转换为数字信号; DSP(数字信号处理器):把数字信号转化为图像; JPEG编码压缩器:把得到的图像转换成JPEG格式; Lens: The main function is to converge the light onto the CCD (Charge Coupled Device); CCD: its function is to convert optical signals into electrical signals; ADC (analog to digital converter): the analog electrical signals into digital signals; DSP Signal processor): the digital signal into an image; JPEG encoding compressor: the resulting image is converted to JPEG format;