ArticlePhotoacoustics2022
Multi-mode laser-ultrasound imaging using Time-domain Synthetic Aperture Focusing Technique (T-SAFT).
Article in Photoacoustics, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Suppressing artifacts and quantitative evaluation of internal defects in laser ultrasonic multi-mode time-domain synthetic aperture focusing technique via mode separation.Photoacoustics · 2026Article
- Research on geometric parameter quantification of rail rolling contact fatigue crack damage based on 2D optical image.Scientific reports · 2026Article
- Laser ultrasonic detection for defects of LAM components based on variable time window intensity mapping with adaptive 2σ thresholds.Photoacoustics · 2024Article
- Mechanochemical Degradation of Biopolymers.Molecules (Basel, Switzerland) · 2023Review
- Adapting the Time-Domain Synthetic Aperture Focusing Technique (T-SAFT) to Laser Ultrasonics for Imaging the Subsurface Defects.Sensors (Basel, Switzerland) · 2023Article
- Research on Photoacoustic Synthetic Aperture Focusing Technology Imaging Method of Internal Defects in Cylindrical Components.Sensors (Basel, Switzerland) · 2023Article
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Authors and funding
6 authors.
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Abstract
The Synthetic Aperture Focusing Technique (SAFT) is an imaging algorithm used in laser ultrasonics (LU) to visualise the appearance of defects. However, ultrasound excited by a pulsed laser has the characteristics of wide bandwidth and multi-mode directivity patterns, leading to common problems in the SAFT process, such as low utilisation of ultrasound information and possible artefacts. To solve these problems, a Multi-mode Time-domain SAFT (MMT-SAFT) algorithm is proposed in this paper. The influence of ultrasonic directivity is discussed according to the imaging depth range, and imaging with multiple LU modes is performed to reduce artefacts. Simulations and experimental results prove the feasibility of the MMT-SAFT algorithm, which not only presents a clearer image of the upper part of defects but also improves image quality compared with time-domain SAFT using a single ultrasonic mode. The proposed technique can provide feasible directions for laser ultrasonic defect imaging.
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