Optical apparatus having device for removing foreign substance

Details Optical apparatus having device for removing foreign substance Optical apparatus having device for removing foreign substance

2008-05-23

2011-12-27

Nguyen, Luong T (Department: 2622)

Television

Camera, system and detail

Optics

C348S335000, C348S207990

Reexamination Certificate

active

08085336

ABSTRACT:
An optical apparatus includes a rectangular optical member provided on an optical axis, and a rectangular vibrating device stuck to the optical member close to and in parallel with one of four sides of the optical member and configured to vibrate the optical member in a wave fashion to have a plurality of nodes parallel with the one side. The vibrating device is configured to operate in two or more vibration modes differing from one another at least in number or positions of the plurality of nodes.

REFERENCES:
patent: 7006138 (2006-02-01), Kawai
patent: 7280145 (2007-10-01), Takizawa et al.
patent: 7324149 (2008-01-01), Takizawa
patent: 7609315 (2009-10-01), Kawai
patent: 2004/0047625 (2004-03-01), Ito et al.
patent: 2007/0223966 (2007-09-01), Fujimoto

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