当我们人类看周围的世界时，我们那自动聚焦的眼睛试图看清每样东西。
When we humans look at the world about us, our autofocus eyes tend to see everything in-focus.
本文分析了自动聚焦的理论依据，提出了实现自动调焦的总体方案和电路设计。
Theoretical basis of automatic focussing are analysed and its system and circuit design are proposed in this paper.
为了满足对三维目标不同深度特征进行观察的需要，在显微视觉系统中增加了局部自动聚焦的功能。
To meet the need of observation of different depth features of 3d object, local autofocusing is added to microscopic vision system.
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