Patent ID: 8085336
Filing Date: 2011-12-27
Classification: G02B,G03B,H04N

Abstract:
1. An optical apparatus comprising: a rectangular optical member provided on an optical axis; and a rectangular vibrating device disposed in parallel with one of four sides of the rectangular optical member and configured to vibrate the rectangular optical member, wherein in a case where the rectangular vibrating device vibrates the rectangular optical member, a plurality of nodes parallel with a longer side of the rectangular vibrating device appears to the rectangular optical member, and wherein the rectangular vibrating device vibrates the rectangular optical member in a first vibration mode and a second vibration mode, the number of the plurality of first nodes which appear when the rectangular vibrating device vibrates the rectangular optical member in the first vibration mode, and the number of the plurality of second nodes which appear when the vibrating device vibrates the rectangular optical member in the second vibration mode, are different with each other, a position of the plurality of first nodes which appear when the rectangular vibrating device vibrates the rectangular optical member in the first vibration mode, and a position of the plurality of second nodes when the vibrating device vibrates the rectangular optical member in the second vibration mode, are different with each other.