A collimated focused ultrasound beam of high acoustic transmission and minimum diffraction achieved by using a lens with subwavelength structures
| Autor: | Junru Wu, Pingtong Huang, Juan Tu, Zhou Lin, Xiasheng Guo, Dong Zhang, Jianchun Cheng |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Diffraction
Materials science Physics and Astronomy (miscellaneous) business.industry medicine.medical_treatment Acoustics High-intensity focused ultrasound Collimated light law.invention Lens (optics) Transducer Planar Optics law otorhinolaryngologic diseases medicine Ultrasonic sensor business Beam (structure) |
| Zdroj: | Applied Physics Letters. 107:113505 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.4931139 |
| Popis: | An acoustic focusing lens incorporated with periodically aligned subwavelength grooves corrugated on its spherical surface has been developed. It is demonstrated theoretically and experimentally that acoustic focusing achieved by using the lens can suppress the relative side-lobe amplitudes, enhance the focal gain, and minimize the shifting of the focus. Use of the lens coupled with a planar ultrasound transducer can generate an ultrasound beam with enhanced acoustic transmission and collimation effect, which offers the capability of improving the safety, efficiency, and accuracy of targeted surgery implemented by high intensity focused ultrasound. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|