Patent ID: 7787031

Claim:
An image-pickup apparatus comprising: an image-pickup device adapted to convert light from an object to an electric signal; an optical member arranged in front of the image-pickup device at a distance from the image-pickup device; a sealing member adapted to block off a space formed between the image-pickup device and the optical member from outside; a surface acoustic wave exciting unit adapted to excite a surface acoustic wave on a surface of the optical member on an object side facing the object when an AC voltage of the predetermined frequency is applied thereto, the surface acoustic wave exciting unit being disposed at one end of the surface located outside of an area where the light from the object transmits into the optical member; and a restrain unit adapted to restrain an occurrence of a reflected wave of the surface acoustic wave, the restrain unit being disposed at the other opposing end of the surface with respect to the surface acoustic wave exciting unit, and the other opposing end being located outside of the area.