Fingerprint imaging using capacitive micromachined ultrasonic transducer impediography with glass waveguide
- Authors
- Kwak, Yun Sang; Choi, Won Young; Park, Kwan Kyu
- Issue Date
- Oct-2017
- Publisher
- IEEE Computer Society
- Citation
- IEEE International Ultrasonics Symposium, IUS
- Indexed
- SCOPUS
- Journal Title
- IEEE International Ultrasonics Symposium, IUS
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/2463
- DOI
- 10.1109/ULTSYM.2017.8091582
- ISSN
- 1948-5719
- Abstract
- Ultrasonic techniques for fingerprint imaging are emerging as an important alternative technology to the traditional capacitive methods. Recently, a pulse-echo based method using a solid interface layer with a waveguide has been investigated for fingerprint imaging. In addition, an impediography method was previously investigated by measuring the pulse damping of the contact area. Both methods require a complex pulse excitation circuit and short pulse duration. In this work, we present an impediography-based implementation, wherein the fingerprint image was acquired by measuring the device impedance instead of the pulse. By using a pseudo-continuous wave (CW) AC signal, we have performed fingerprint imaging, using a waveguide.
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Collections - 서울 공과대학 > 서울 기계공학부 > 1. Journal Articles
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