College Physics ›› 2018, Vol. 37 ›› Issue (7): 63-69.doi: 10. 16854 /j. cnki. 1000-0712. 170584

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Focusing acoustic lens based on Fresnel zone plate

LEI Jia-yu,ZHANG Yu,HOU Chun-feng,WANG Yu-xiao   

  1. Department of Physics,Harbin Institute of Technology,Harbin,Heilongjiang 150001,China
  • Online:2018-07-20 Published:2018-07-20

Abstract: 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.

Key words: ultrasound, Fresnel zone plate, numerical simulation of SPL, focusing acoustic lens