Autofocus control apparatus and method applied to microscope

摘要

The preceding-profile of a specimen image upon inserting a preceding objective lens in the optical path to a specimen placed on a stage is detected. The succeeding-profile of the specimen image upon inserting a succeeding objective lens in the optical path is predicted on the basis of the preceding- and succeeding-optical parameters of the preceding and succeeding objective lenses inserted in the optical path, and the preceding-profile. The position of the stage with respect to the specimen is adjusted on the basis of the succeeding-profile obtained by this prediction.