Olympus Optical Company, Ltd.

Hirohisa Fujimoto

Yukio Eda

Nahoko Hisata

Shuichi Ito

Kenya Okazaki

Yukawa Hiroshi

A tube scanner comprises a piezoelectric ceramic in the form of a hollow cylinder, which is externally surrounded by a Z-axis outside electrode and four slip-shaped driving electrodes arranged at intervals in the circumferential direction. The piezoelectric ceramic is internally surrounded by a Z-axis inside electrode and an XY-axis common electrode. The Z-axis inside electrode faces the Z-axis outside electrode across the piezoelectric ceramic, while the XY-axis common electrode faces the X- and Y-axis driving electrodes across the ceramic. Opposite-polarity voltages are applied to the Z-axis outside electrode and the Z-axis inside electrode, individually, whereupon the tube scanner is displaced in the Z-axis direction.

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Hachioji, Japan

Hirohisa Fujimoto