Inspired by the optical Fresnel zone plate，we improve，design and fabricate ultrasound Fresnel
zone plates based on diffraction theory，make them adapt for focusing acoustic waves. The simple - structure and low - cost invention can be an ideal candidate for a series of applications in ultrasonic imaging with the advantages of great amplification and wide frequency range.
LEI Jia-yu, ZHANG Yu, HOU Chun-feng, WANG Yu-xiao. Focusing acoustic lens based on Fresnel zone plate[J]. College Physics, 2018, 37(7): 63-69. DOI: 10. 16854 /j. cnki. 1000-0712. 170584
