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Updated: May 7, 2026

Three-dimensional Optical-resolution Photoacoustic Microscopy
Published on: May 3, 2011
Fingerprint imaging of dry finger using photoacoustics
Won Young Choi1, Kwan Kyu Park2
1Department of Convergence Mechanical Engineering, Hanyang University, Seoul 04763, Republic of Korea cwy1533@hanyang.ac.kr.
Abstract:
Fingerprint imaging has been widely used in biometric identification systems. This work presents a photoacoustic (PA) fingerprint imaging system that provides acoustic resolution using a pulsed laser and focused ultrasound transducer operating as a receiver. This PA system can measure dry fingers with a wide-range laser field based on the differences in the ultrasound coupling between the fingertip areas contacting and not contacting a solid plate. To demonstrate and validate the image accuracy of the PA system, PA fingerprint images were compared to images captured using a pulse-echo ultrasound system and an ink-pressed fingerprint scan.
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