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Planar Ultrasonic Lenses Formed by Concentric Circular Sandwiched‐Ring Arrays
Author(s) -
Xia Xiangxiang,
Cai Feiyan,
Li Fei,
Meng Long,
Ma Teng,
Zhou Hui,
Ke Manzhu,
Qiu Chunyin,
Liu Zhengyou,
Zheng Hairong
Publication year - 2019
Publication title -
advanced materials technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.184
H-Index - 42
ISSN - 2365-709X
DOI - 10.1002/admt.201800542
Subject(s) - planar , concentric , materials science , lens (geology) , optics , silicone resin , underwater , ring (chemistry) , silicone , ultrasonic sensor , phase (matter) , composite material , acoustics , geometry , physics , computer science , chemistry , mathematics , oceanography , computer graphics (images) , organic chemistry , geology , coating , quantum mechanics
An underwater ultrasonic planar lens is numerically and experimentally developed with a small thickness and maintains a highly efficient transmission. The lens is formed by an array of concentric circular resin rings sandwiched between two identical silicone rings. Since the velocity of the water is closely in between that of the resin and silicone, a 2π phase variation can be achieved by changing the thickness ratios of the resin to the silicone ring within a thin sandwiched structure. Based on this principle, both single‐point and multipoint focusing lenses with high transmission in the axial direction are realized, which are believed to have potential applications in underwater imaging and detection.