An optically transparent focused P(VDF-TrFE) transducer for Photoacoustic Microscopy (PAM)

Cheng Fang; Zijie Zhao; Jie Fang; Jun Zou

doi:10.1117/12.2648118

9 March 2023 An optically transparent focused P(VDF-TrFE) transducer for Photoacoustic Microscopy (PAM)

Cheng Fang, Zijie Zhao, Jie Fang, Jun Zou

Proceedings Volume 12379, Photons Plus Ultrasound: Imaging and Sensing 2023; 123791E (2023) https://doi.org/10.1117/12.2648118
Event: SPIE BiOS, 2023, San Francisco, California, United States

Conference Poster

Abstract

This paper reports a new optically transparent focused P(VDF-TrFE) (poly(vinylidene fluoride-co-trifluoroethylene)) transducer for photoacoustic microscopy (PAM), which is fabricated by a new process based on pre-cutting and direct-lamination. Compared with the previous fabrication process, it is simpler, and makes it possible to achieve a high numerical aperture (NA) without stretching the (brittle) piezoelectric film. For demonstration, a prototype transducer has been fabricated with a 10-μm-thick 70/30 P(VDF-TrFE) film laminated onto a plano-concave glass lens with an NA of 0.64. Experimental characterization shows that the transducer has an optical transmittance of 88.6% (@ 532 nm), an acoustic center frequency and -3 dB bandwidth of 24 MHz and 29 MHz, respectively. Using the new optically transparent focused P(VDF-TrFE) transducer, an optical-resolution PAM (OR-PAM) imaging setup has been built and imaging experiments have been conducted on different targets. The experimental results show the optically transparent focused P(VDF-TrFE) transducer could be useful for the development of new PAM systems for different imaging applications.

Citation Download Citation

Cheng Fang, Zijie Zhao, Jie Fang, and Jun Zou "An optically transparent focused P(VDF-TrFE) transducer for Photoacoustic Microscopy (PAM)", Proc. SPIE 12379, Photons Plus Ultrasound: Imaging and Sensing 2023, 123791E (9 March 2023); https://doi.org/10.1117/12.2648118

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