| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve handleability by realizing the highly accurate observation of a wide range in simple constitution. <P>SOLUTION: The focus of an aim variable object optical system 9 for acquiring the optical image of an operation part Q is automatically focused through an automatic focusing mechanism. Also, within the range of the depth of field, a focus position where the resolution of the focusing variable object optical system 9 is highest by the automatic focusing mechanism is variably set at a position deviating from the operation part Q by a prescribed distance. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
