High-Frequency Ultrasound Focusing Using Low-Cost PMMA and PDMS Acoustic Lenses
Ghasemishabankareh, Mohammadamir (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Hui, Zeyuan (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Torres, Francesc 1948- (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)
Barniol i Beumala, Núria (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica)

Date:	2026
Abstract:	This study presents a high-frequency ultrasound lens system that uses simply fabricated and low-cost acoustic lenses made from PMMA and PDMS materials. These lenses are designed for higher-frequency operation around 20 MHz, providing suitability for demanding high-frequency ultrasonic applications. They were designed and fabricated specifically for integration with a PMUT array, ensuring proper compatibility with array-based high-frequency ultrasonic imaging. Both Fresnel and convex lens designs were evaluated through axial and lateral beam measurements, along with pulse-echo testing in the focal region. The results show that the PMMA and PDMS lenses can produce a well-defined focus and a stable echo response despite their simple and low-cost fabrication. This demonstrates the feasibility of low-cost materials for high-frequency ultrasonic focusing in PMUT array applications.
Grants:	Agencia Estatal de Investigación PID2022-136624OB-I00
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Ultrasound ; Focusing ; Fresnel lens ; Convex lens ; MEMS ; PMUT array
Published in:	Micromachines, Vol. 17, Num. 4 (April 2026) , art. 414, ISSN 2072-666X

DOI: 10.3390/mi17040414

19 p, 5.1 MB

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