High-overtone self-focusing acoustic transducers for high-frequency ultrasonic Doppler
| Autor: | Qifa Zhou, Eun Sok Kim, Hongyu Yu, Chuang-Yuan Lee, K. Kirk Shung, Changhong Hu, Jie Zhu, Dawei Wu, Gaofeng Wang |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Acoustics and Ultrasonics business.industry Overtone Acoustics Transducers Ultrasound Fresnel lens Doppler Effect Lead zirconate titanate Article law.invention chemistry.chemical_compound symbols.namesake Optics Transducer Capacitive micromachined ultrasonic transducers chemistry law Harmonic symbols Ultrasonics business Doppler effect |
| Zdroj: | Ultrasonics. 50:544-547 |
| ISSN: | 0041-624X |
| DOI: | 10.1016/j.ultras.2010.02.002 |
| Popis: | This work reports the potential use of high-overtone self-focusing acoustic transducers for high-frequency ultrasonic Doppler. By using harmonic frequencies of a thick bulk Lead Zirconate Titanate (PZT) transducer with a novel air-reflector Fresnel lens, we obtained strong ultrasound signals at 60 MHz (3rd harmonic) and 100 MHz (5th harmonic). Both experimental and theoretical analysis has demonstrated that the transducers can be applied to Doppler systems with high frequencies up to 100 MHz. |
| Databáze: | OpenAIRE |
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