Vibrating device and vibration control method
A vibrating device includes a translucent cover, an ejector to eject a liquid onto the surface of the translucent cover, and a first vibrating portion to vibrate the translucent cover at a vibration acceleration of larger than about 8.0×10 5 m/s 2 and equal to or smaller than about 21.0×10 5 m/s 2 .
1. A vibrating device comprising:
a translucent cover;
an ejector to eject a liquid onto a surface of the translucent cover; and
a first vibrating portion configured to vibrate the translucent cover at a vibration acceleration of larger than about 8.0×10 5 m/s 2 and equal to or smaller than about 21.0×10 5 m/s 2 .
2. The vibrating device according to claim 1 , further comprising a controller configured or programmed to control the first vibrating portion and the ejector.
3. The vibrating device according to claim 2 , wherein
the first vibrating portion includes a piezoelectric device; and
the controller is configured or programmed to control the vibration acceleration by controlling a voltage applied to the piezoelectric device to be higher than about 15 Vp-p and equal to or lower than about 40 Vp-p.
4. The vibrating device according to claim 2 , further comprising one or more second vibrating portions controlled by the controller and positioned around the translucent cover.
5. The vibrating device according to claim 4 , wherein
the one or more second vibrating portions include a plurality of second vibrating portions;
the plurality of second vibrating portions are equidistantly positioned around the translucent cover.
6. The vibrating device according to claim 1 , wherein a water-repellent coating layer is located on the surface of the translucent cover.
7. The vibrating device according to claim 6 , wherein the water-repellent coating layer includes a plurality of protrusions on the surface of the translucent cover.
8. The vibrating device according to claim 2 , wherein the controller includes a central processing unit.
9. An image pickup unit comprising:
the vibrating device according to claim 1 ;
an image pickup portion; and
a housing accommodating the vibrating unit and the image pickup portion therein.
10. The image pickup unit according to claim 9 , wherein the housing has a tubular shape.
11. The image pickup unit according to claim 9 , further comprising a controller configured or programmed to control the first vibrating portion and the ejector.
12. The image pickup unit according to claim 11 , wherein
the first vibrating portion includes a piezoelectric device; and
the controller is configured or programmed to control the vibration acceleration by controlling a voltage applied to the piezoelectric device to be higher than about 15 Vp-p and equal to or lower than about 40 Vp-p.
13. The image pickup unit according to claim 11 , further comprising one or more second vibrating portions controlled by the controller and positioned around the translucent cover.
14. The image pickup unit according to claim 13 , wherein
the one or more second vibrating portions include a plurality of second vibrating portions; and
the plurality of second vibrating portions are equidistantly positioned around the translucent cover.