1. Institute of Symbiotic Science & Technology, Tokyo University of Agriculture & Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8558, Japan
2. Divison of Art and Innovative Technology, K & W Inc, 1-3-16-901 Higashi, Kunitachi, Tokyo 186-0002, Japan
3. Advanced Microscope Systems Design Department, Hitachi High-Technologies Corp., 882 Ichige, Hitachinaka, Ibaraki 312-8504, Japan