Title :
Cylindrical acoustic Luneburg lens
Author_Institution :
Div. of Marine Eng., Mokpo Nat. Maritime Univ., Mokpo, South Korea
Abstract :
We developed a two-dimensional acoustic Luneburg lens by changing the density of the medium inside the lens. The lens has a cylindrical shape and composes of about seven hundred aluminum columns with various radii of less than 2cm. It has 15 layers and the diameter of the lens is 60cm. The lens focuses the incoming acoustic waves on the edge of the opposite side of the lens as well in the frequency range of 1, 500Hz ~ 2, 500Hz. It increases the acoustic pressure of the incoming wave by 3 ~ 5 times.
Keywords :
acoustic devices; acoustic imaging; acoustic materials; aluminium; gradient index optics; lenses; 2D acoustic Luneburg lens; Al; acoustic pressure; acoustic waves; aluminum columns; cylindrical acoustic Luneburg lens; lens diameter; medium density; size 60 cm; Acoustics; Aluminum; Electromagnetics; Lenses; Metamaterials;
Conference_Titel :
Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), 2014 8th International Congress on
Conference_Location :
Lyngby
Print_ISBN :
978-1-4799-3450-8
DOI :
10.1109/MetaMaterials.2014.6948561
