Work

Photoacoustic endoscopic probe based on lens scanning using a laterally tunable electrowetting liquid lens

Year: 2025

Type: article

Abstract: Most existing photoacoustic endoscopies (PAEs) rely on external scanning methods, which can result in a bulky and complex probe. We propose a laterally tunable liquid lens that enables direct focal point shifting, eliminating the need for an external scanning mirror. This reduces system size and enhances endoscopic applications. Ray tracing analysis and experiments confirmed the lens’s tunability, achieving 20 mm axial shifting and 4.42° lateral tilting at 45.3 V rms . Integrated into a probe, the lens significantly improved photoacoustic imaging, yielding nearly four times the signal intensity of conventional stage scanning. Therefore, the proposed lens holds great potential for compact PAE.

Source: Optics Express

DOI: 10.1364/oe.562757

Authors: Seungwan Seo, Kiri Lee, Sung Keun Yoo, Jonghyun Eom, Yangkyu Park

Institutions: Osong Medical Innovation Foundation, Korea Photonics Technology Institute

Language: English

Topic: Photoacoustic and Ultrasonic Imaging

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,270

Funders: Ministry of Education, Ministry of Trade, Industry and Energy