Abstract

This paper deals with ultrasonic linear motors using a double-mode vibrator and their application to driving a light pick-up element of CD-ROM etc. We have already invented some ultrasonic linear motors. In the first part of this paper, two kinds of the motors using a square plate vibrator are proposed; one construction is the motor using an extensional mode and a bending mode, and the other is using degenerated bending modes of the same form. Their construction and characteristics are shown. The second part contains experimental investigation of the linear motor using a L1-B2 mode rectangular plate. Characteristics of the device of which a light pick-up element is mounted on a linear motor are presented

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