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阐述了以ＣＣＤ为光电探测器件，采用步进电机驱动，集工作台自动扫描、自动调焦和图像的自动采集为一体的显微镜系统自动调焦机理，改进了均方差评价函数，完成了自动调焦，为显微图像的采集和处理提供了强有力的手段。
The mechanism of automatic focusing of the microscope system using CCD as the photodetection device, stepping motor driven, automatic scanning of workbench, automatic focusing and automatic image acquisition was introduced. The mean square error evaluation function was improved and the auto-tuning Coke, for micro-image acquisition and processing provides a powerful tool.