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Modified Phase-Offset-Driven Lissajous Scanning Endomicroscopy With a Polyimide-Film-Based Frequency Separator

Title
Modified Phase-Offset-Driven Lissajous Scanning Endomicroscopy With a Polyimide-Film-Based Frequency Separator
Author(s)
Im, JintaekChang, YeonheeSong, Cheol
Issued Date
2022-12
Citation
IEEE/ASME Transactions on Mechatronics, v.27, no.6, pp.1 - 10
Type
Article
Author Keywords
Resonant frequencyElectron tubesActuatorsProbesLensesOptical imagingEndomicroscopyConfocal endomicroscopic systemlissajous scanningmodified phase-offset-driven methodpolyimide (PI) film
Keywords
LOW-COSTMOTIONMICROSCOPYENDOSCOPEDESIGNSYSTEM
ISSN
1083-4435
Abstract
This article presents a Lissajous scanning confocal endomicroscopy comprising an easily manufacturable thin polyimide (PI) film and modified phase-offset-driven scanning. The Lissajous scanning confocal probe has a piezoelectric tube actuator and the PI film-attached fiber cantilever designed to resonate with the lever mechanism. Data from a finite element analysis and experiments are used to optimize the dimensions of the PI film, which produces a frequency separation and field of view of $195\;{\bf{Hz}}$ and $180\;\mu {\bf{m}}\; \times \;180\;\mu {\bf{m}}$, respectively, at driving voltages less than $30\;{{\bf{V}}_{pp}}$. The best combination of decimal frequencies with optimized driving phase offsets is determined to achieve a scanning density (SD) exceeding $80\%$ consistently with an imaging speed of $8\;{\bf{Hz}}$. By analyzing the Lissajous patterns at different decimal frequency combinations via time-delay analysis, it is possible to find more diverse combinations that meet the SD criterion. When the scanning patterns deviate from the desired paths, the proposed modified phase-offset-driven method is applied to maintain the best scanning pattern. The USAF 1951 test pattern, several plants, and rat gastrointestinal tract were imaged successfully using the confocal endomicroscopic system with the PI film and modified phase-offset-driven scanning.
URI
http://hdl.handle.net/20.500.11750/17182
DOI
10.1109/TMECH.2022.3166453
Publisher
Institute of Electrical and Electronics Engineers
Related Researcher
• Song, Cheol 로봇및기계전자공학과
• Research Interests Handheld medical robotics; Smart robotic microsurgery; Smart neuro-rehabilitation; Bio-photonic sensing and imaging
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Appears in Collections:
Department of Robotics and Mechatronics Engineering Intelligent Bio-OptoMechatronics Lab 1. Journal Articles