| 摘要 |
PROBLEM TO BE SOLVED: To easily and surely set the offset adjustment of a focusing position to all the samples which can be automatically focused by adjusting the focal distance of a correction lens group and electrically driving a focal distance adjusting mechanism in accordance with the magnification of each objective lens. SOLUTION: A control part 25 gives a driving instruction to a correction lens driving part 20 to drive a color correction lens motor 17, to adjust the moving amount of a color correction lens group 9 in the optical direction and to correct the image forming position of a P.D.14. Since the corrected moving amount is different between the objective lenses 3a and 3b, respectively, it is stored in the every lenses to be used 3a and 3b. In such a way, since the optimum adjustment is performed for every magnification of the lenses 3a and 3b, the offset operation is always performed by the fixed moving amount of the lens regardless of the kinds of the lenses 3a and 3b. Therefore, the offset adjustment is always easily and surely set to all the samples in surplus adjusting width. |
