WeChat Mini Program
Old Version Features

Two-Dimensional Reconstructed Image of a Subsurface Structure Using Continuous Scanned Photothermal Imaging

Photonic Sensors(2025)

Waseda University

Cited 0|Views3
Abstract
This study presents the two-dimensional(2D)image of a subsurface structure reconstructed using an imaging method based on the photothermal effect.The photothermal imaging method is based on the deflection method using two lasers:pump and probe lasers.A continuous scanning technique is proposed for 2D(x-and y-directions)surface scanning.The continuous scanning method is compared with the conventional point-by-point scanning technique,and a low-pass fast Fourier transform filter and a Marr-Hildreth detector are found to produce significant results.The photothermal imaging method with continuous 2D surface scanning is performed on three copper-resin double-layer samples with differentsubsurface structures.The subsurface structures of the copper-resin double-layer samples comprise a square block of 5×5 mm2 area and blocks shaped as the alphabet letters"T"and"F".The letters are 3 mm wide and 10×13 mm2 in area.All three shapes are 1 mm thick and located at a depth of 0.5 mm from the surface of the copper block.The reconstructed photothermal images show an absolute error within 0.122 mm compared with the actual subsurface structure,equivalent to a 2.3%relative error.
More
Translated text
Key words
Photothermal effect,photothermal imaging,nondestructive test,reconstruction,visualization,tomography
PDF
Bibtex
AI Read Science
Must-Reading Tree
Example
Generate MRT to find the research sequence of this paper
Data Disclaimer
The page data are from open Internet sources, cooperative publishers and automatic analysis results through AI technology. We do not make any commitments and guarantees for the validity, accuracy, correctness, reliability, completeness and timeliness of the page data. If you have any questions, please contact us by email: report@aminer.cn
Chat Paper
Summary is being generated by the instructions you defined