Abstract
This paper describes a micromanipulation which automatically performs picking-up and releasing of a micro object with an optical microscope and two micromanipulators. The picking-up of a micro object requires an exact distance of depth between a micro object and a tip of the micromanipulator. The authors propose a depth estimation method which is using difference between the blur widths of a micro object and the tip. By using the proposed method, the tip is able to move to the position of a micro object. The releasing of a micro object is performed with a vibration motor. The vibration of the direction of depth is able to release a micro object to under the micromanipulator. In the experiments, the micromanipulation is completed the automatic picking-up and releasing of a micro object. Effectiveness of the micromanipulation is shown by these experimental results.