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

作     者：Moojoong KIM Hyunjung KIM 

作者机构：Research Institute for Science and EngineeringWaseda UniversityTokyo 169-8555Japan Department of Mechanical EngineeringAjou UniversitySuwon 16499Republic of Korea 

出 版 物：《Photonic Sensors》 (光子传感器(英文版))

年 卷 期：2025年第15卷第2期

页      面：1-12页

核心收录：

学科分类：080901[工学-物理电子学] 070207[理学-光学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：supported by Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Education,Republic of Korea(Grant No.NRF-2015R1D1A1A01060704) Japan Society for the Promotion of Science(JSPS)KAKENHI,Japan(Grant No.JP23K13269) 

主　　题：Photothermal effect photothermal imaging nondestructive test reconstruction visualization tomography 

摘      要：This study presents the two-dimensional(2D)image of a subsurface structure reconstructed using an imaging method based on the photothermal *** 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 *** 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 *** photothermal imaging method with continuous 2D surface scanning is performed on three copper-resin double-layer samples with different subsurface *** subsurface structures of the copper-resin double-layer samples comprise a square block of 5×5 mm^(2) area and blocks shaped as the alphabet letters“Tand“F.The letters are 3 mm wide and 10×13 mm^(2) in *** three shapes are 1 mm thick and located at a depth of 0.5 mm from the surface of the copper *** reconstructed photothermal images show an absolute error within 0.122 mm compared with the actual subsurface structure,equivalent to a 2.3%relative error.