| 摘要 |
<p>An electrostatic actuator comprises first and second movable sections (2A, 2B) and a stator (3). The stator (3) has a hollow frame into which the movable sections (2A, 2B) are arranged independently. Driving electrodes (4, 8) are provided on surfaces of the movable sections (2A, 2B) and holding electrodes (5, 11) are also provided on the opposite surfaces pf the movable section (2A, 2B). A driving electrode section (12) is provided on the inner surface of the stator (3) facing the driving electrodes (4, 8) on the movable section (2A, 2B). Also, holding electrode sections (14A, 14B) are provided on the inner surface of the stator (3) facing the holding electrodes (5, 11) on the movable section. Stripes of the electrodes (4, 8, 12) are arranged in a longitudinal direction and each strip is extended in a lateral direction crossing the longitudinal direction, and the holding electrodes (5), (11, 14A, 14B) are extended in the longitudinal direction. Lenses (6, 9) are mounted to the movable sections (2A, 2B) and the movable sections (2A, 2B) are moved between the electrode section (12) and the electrode sections (14A, 14B) and fixed independently so as to focus the image to be photographed, thereby magnifying or reducing the photographed image. <IMAGE></p> |
