US 12,322,372 B2
Acoustic Luneburg meta lens and design method thereof
Gunn Hwang, Daejeon (KR); Sang-Hoon Kim, Mokpo-si (KR); and Jung-Woo Kim, Pyeongtaek-si (KR)
Assigned to Electronics and Telecommunications Research Institute, Daejeon (KR); and Mokpo National Maritime University Industry-Academic Cooperation Foundation, Mokpo-si (KR)
Filed by ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR); and MOKPO NATIONAL MARITIME UNIVERSITY INDUSTRY-ACADEMIC COOPERATION FOUNDATION, Mokpo-si (KR)
Filed on Dec. 23, 2021, as Appl. No. 17/561,539.
Claims priority of application No. 10-2021-0052341 (KR), filed on Apr. 22, 2021.
Prior Publication US 2022/0342118 A1, Oct. 27, 2022
Int. Cl. G10K 11/30 (2006.01); G02F 1/33 (2006.01); G10K 11/18 (2006.01); H04R 1/32 (2006.01); G02B 1/00 (2006.01)
CPC G10K 11/30 (2013.01) [G02B 1/002 (2013.01); G10K 2200/10 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An acoustic Luneburg meta lens comprising:
a lens structure;
a substrate under the lens structure; and
a reflection plate on the substrate, wherein:
the lens structure includes a plurality of unit structures;
a volume of the unit structures decreases from a center of the lens structure toward an edge thereof;
positions of the unit structures are determined by a radial direction component and a tangential direction component of a polar coordinate system;
the lens structure has a semi-circular shape; and
one surface of the lens structure is in contact with the reflection plate.