Article(id=1319955120004120647, tenantId=1146029695717560320, journalId=1278651732997652489, issueId=1319955119433695302, articleNumber=null, orderNo=null, doi=10.12086/oee.2026.250166, pmid=null, cstr=32245.14.oee.2026.250166, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1749398400000, receivedDateStr=2025-06-09, revisedDate=1763568000000, revisedDateStr=2025-11-20, acceptedDate=1763654400000, acceptedDateStr=2025-11-21, onlineDate=1792631424188, onlineDateStr=2026-10-22, pubDate=1774368000000, pubDateStr=2026-03-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1792631424188, onlineIssueDateStr=2026-10-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1792631424188, creator=13701087609, updateTime=1792631424188, updator=13701087609, issue=Issue{id=1319955119433695302, tenantId=1146029695717560320, journalId=1278651732997652489, year='2026', volume='53', issue='3', pageStart='250166', pageEnd='1', issueExtLink='null', onlineDate='null', pubDate='1774368000000', pubDateStr='2026-03-25', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1792631424052, creator='13701087609', updateTime=1792631424052, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext=null, issueFiles=null, downloadFileDto=null}, startPage=250166, endPage=1, ext={EN=ArticleExt(id=1319955120255778888, articleId=1319955120004120647, tenantId=1146029695717560320, journalId=1278651732997652489, language=EN, title=White-light interferometry based on phase correction using amplitude in wavenumber domain, columnId=1279511634116841602, journalTitle=Opto-Electronic Engineering, columnName=Article, runingTitle=null, highlight=null, articleAbstract=
Objective White-light interferometry is widely employed in precision manufacturing sectors, including semiconductor processing, thin-film thickness measurement, and metal defect detection, owing to its merits of high precision, high measurement speed, and non-contact nature. The frequency domain analysis (FDA) technique has been applied to surface profile measurement by utilizing the slope of the phase distribution of the white-light scanning interference signal in the wavenumber domain. Through simulations and experiments, this study demonstrates that the accuracy of the phase obtained in the wavenumber domain is related to the amplitude distribution, whether in the presence of additive noise or phase noise, and quantitatively provides the optimal phase selection range for the FDA method. When the sample has strong spectral absorption, parts of the amplitude distribution in the wavenumber domain decrease significantly, rendering the corresponding phase information invalid and unreliable. To address this limitation, an improved algorithm is proposed in this paper, which incorporates the wavenumber-domain amplitude as a weighting factor into the least-squares fitting procedure. This method avoids the selection of the phase range for the FDA method and ensures high measurement accuracy.
Methods In the simulation, the zero-mean Gaussian noise with a standard deviation (STD) of 10 nm is used as the phase noise εn(z) to generate a white-light interference signal. The Fourier transform is performed on the signal to obtain the amplitude IF($\sigma $) and phase ($\sigma $) in the wavenumber domain. For the FDA method, the selected phase range $R_\sigma $ is defined as the wavenumber range corresponding to amplitudes in IF($\sigma $) that are greater than CImax, where the coefficient C∈(0, 1) and Imax is the maximum value of IF($\sigma $). The STD of zs represents the measurement accuracy of the FDA approach. The influence of phase noise on the measurement accuracy and its relationship with amplitude distribution IF($\sigma $) are investigated by calculating the STD of zs across different $R_\sigma $. Furthermore, additive noise is added to the white-light interference signal with phase noise, and the STD of zs is evaluated under varying $R_\sigma $ to determine the optimal phase selection range. Since conventional phase selection is not suitable for interference signals with complicated spectral distributions, this paper proposes a special frequency domain algorithm based on amplitude optimization in the wavenumber domain (amplitude optimization for frequency domain analysis, AOFDA). In this improved strategy, the amplitude distribution IF($\sigma $) is introduced as a weighting factor in the phase linear fitting process to obtain the optimized surface measurement parameter zw.
Results and Discussions The simulation results indicate that when only phase noise exists, the accuracy of phase extraction improves with the increase in the amplitude corresponding to the selected phase, thereby enhancing the overall measurement precision. However, the phase extraction accuracy has an upper limit. When the range $R_\sigma $ corresponding to C≥0.5 is selected in the FDA method, the measurement results exhibit higher accuracy. Additive noise with different signal-to-noise ratio (SNR) is introduced into the white-light interference signal containing phase noise. For interference signals with the same SNR, the STD of zs obtained with C≥0.5 is stable and relatively low. For signals with stronger additive noise, the STD of zs shows a slight increase when C>0.5. In summary, if only phase noise exists, selecting the range $R_\sigma $ corresponding to C≥0.5 yields high measurement precision. When both phase noise and additive noise exist, C=0.5 provides higher measurement precision. Therefore, the $R_\sigma $ corresponding to C=0.5 is the optimal phase selection range for the FDA method.
To verify the feasibility of the AOFDA method for interference signals with complex spectral distributions, a band-stop filter spectral distribution was used as the absorption spectrum of the measured object in the simulation. In the band-stop range, simulations with different reflectivities were conducted to investigate the measurement accuracy. When the reflectivity of the sample is ≥20%, it exerts little influence on the measurement accuracy of the FDA method. However, the reflectivity of <20% moves the measurement results away from their true values. When the reflectivity of the sample is <20%, the measurement results obtained by the AOFDA method always exhibit better performance. This indicates that the measurement accuracy of the AOFDA method is largely unaffected by the absorption spectrum of the sample.
The flat surface of wedged window and the step surface were measured in the experiment. When the different value of C is selected to obtain the surface profile of the wedged window, the C=0.5 has the better performance that agrees with simulation result. The Sz of the wedged window surface calculated by the AOFDA method and the FDA method (C=0.5) are 34.6 nm and 50.2 nm, and the Sq are 5.5 nm and 6.7 nm, respectively. The average step heights, whose value is regarded as 3.0 μm, of 10 measurements calculated by the AOFDA method and the FDA method (C=0.5) are 3.0054 μm and 2.9566 μm, and the repeatability values are 17.9 nm and 19.4 nm, respectively. The experimental results demonstrate that the AOFDA method can achieve the measurement accuracy comparable to that of the FDA method when selecting the optimal wavenumber-domain phase range. Since the selection of an appropriate wavenumber-domain phase range is no longer required for the AOFDA method, it enables the white-light interferometer to better adapt to complex measurement environments.
Conclusions The measurement accuracy of the FDA method is degraded by environmental vibration and background noise. This work confirms that the measurement precision of the FDA method is correlated with the amplitude distribution in the wavenumber domain through the selection of diverse phase ranges, and proposes a feasible phase selection strategy to enhance its measurement performance. It is verified that the FDA method is difficult to adapt to the situation where the sample has a strong absorption spectrum. To address these limitations, the AOFDA method is developed in this paper, which incorporates the wavenumber-domain amplitude distribution as a weighting function into the phase fitting procedure. The AOFDA method can achieve a measurement accuracy comparable to that of the FDA method processed with the optimal phase range, while eliminating the need for determination of the optimal phase range.
, authors=Ao Shu
1, Songjie Luo
1, Changsheng Ji
1, Osami Sasaki
1, 2, Xiaoyan Wang
1, Ziyang Chen
1, Jixiong Pu
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, copyrightStatement=Copyright © 2026 Opto-Electronic Engineering. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1319955138903654615, articleId=1319955120004120647, tenantId=1146029695717560320, journalId=1278651732997652489, language=CN, title=基于波数域振幅修正相位的白光干涉测量, columnId=1319955120360636489, journalTitle=光电工程, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=
空间频域算法使用白光干涉信号波数域相位的斜率来测量物体的表面形貌分布,受到环境振动和背景噪声的影响,空间频域算法不能保证测量精度。本文通过仿真和实验验证了空间频域算法的测量精度和白光干涉信号的波数域相位选取范围相关,定量地给出了可以提高空间频域算法测量精度的波数域相位选取范围。提出一种算法,将波数域振幅作为权重因子加入最小二乘法中来拟合白光干涉信号的波数域的相位分布,得到优化后的相位斜率用以测量表面形貌,该方法避免了选取波数域相位范围的操作,保证了较高的测量精度,可以帮助白光干涉仪适应更加复杂的工作环境。
, authors=舒奥
1, 罗松杰
1, *, *, 季长胜
1, 佐佐木修己
1, 2, 王孝艳
1, 陈子阳
1, 蒲继雄
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作者贡献
舒奥:仿真、实验、数据分析,论文写作;罗松杰:指导论文选题、设计研究方法、数据分析、论文写作、修改; 季长胜:实验、论文审阅和修改;佐佐木修己:指导论文选题、论文审阅;王孝艳、陈子阳、蒲继雄:论文审阅、编辑。
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58 (13): 3548−3554., articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1319955139218227416, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, xref=1, ext=[AuthorCompanyExt(id=1319955139226616025, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, companyId=1319955139218227416, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1Fujian Provincial Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen, Fujian 361021, China), AuthorCompanyExt(id=1319955139230810330, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, companyId=1319955139218227416, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
1福建省光传输与变换重点实验室,华侨大学信息科学与工程学院,福建 厦门 361021)]), AuthorCompany(id=1319955139297919195, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, xref=2, ext=[AuthorCompanyExt(id=1319955139306307804, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, companyId=1319955139297919195, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2Graduate School of Science and Technology, Niigata University, Niigata 9502181, Japan), AuthorCompanyExt(id=1319955139314696413, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, companyId=1319955139297919195, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
2新潟大学科学技术研究生院,日本 新潟 9502181)])], figs=[ArticleFig(id=1319955143743881484, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=EN, label=Fig.1, caption=
Schematic of white-light scanning interferometer, figureFileSmall=wWlQPRDkVUfqi6MaZ6hjEw==, figureFileBig=YCGvQNv6GNtPE1lfCOL4dA==, tableContent=null), ArticleFig(id=1319955143873904909, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=CN, label=图1, caption=
白光扫描干涉仪示意图, figureFileSmall=wWlQPRDkVUfqi6MaZ6hjEw==, figureFileBig=YCGvQNv6GNtPE1lfCOL4dA==, tableContent=null), ArticleFig(id=1319955144096203022, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=EN, label=Fig.2, caption=
Amplitude and phase distribution of white light interference signal in wavenumber domain. (a) Simulated white-light interference signal; (b) Amplitude distribution; (c) Phase distribution, figureFileSmall=I7GiXWfgLK4w1R+pUHEuSg==, figureFileBig=aKXHQ3X2gj4UJftdvzhgCw==, tableContent=null), ArticleFig(id=1319955144180089103, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=CN, label=图2, caption=
白光干涉信号在波数域中的振幅和相位分布。 (a) 仿真白光干涉信号; (b) 振幅分布; (c) 相位分布, figureFileSmall=I7GiXWfgLK4w1R+pUHEuSg==, figureFileBig=aKXHQ3X2gj4UJftdvzhgCw==, tableContent=null), ArticleFig(id=1319955144251392272, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=EN, label=Fig.3, caption=
Standard deviation of zs obtained with different coefficients C, figureFileSmall=s/8RZB9EZQlMiwY+8v77Dg==, figureFileBig=dkeydDamu/YZRHMZU6mzWA==, tableContent=null), ArticleFig(id=1319955144331084049, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=CN, label=图3, caption=
不同系数C得到zs的标准差, figureFileSmall=s/8RZB9EZQlMiwY+8v77Dg==, figureFileBig=dkeydDamu/YZRHMZU6mzWA==, tableContent=null), ArticleFig(id=1319955146033971474, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=EN, label=Fig.4, caption=
Standard deviation of zs obtained with different additive noises, figureFileSmall=Gr8GpapIHQVIpSAd6nYTuA==, figureFileBig=5NUoqFRFSLM9rlWvKcgmTw==, tableContent=null), ArticleFig(id=1319955146130440467, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=CN, label=图4, caption=
不同加性噪声条件下得到的zs标准差, figureFileSmall=Gr8GpapIHQVIpSAd6nYTuA==, figureFileBig=5NUoqFRFSLM9rlWvKcgmTw==, tableContent=null), ArticleFig(id=1319955146247880980, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=EN, label=Fig.5, caption=
Standard deviations of zs and zw obtained with different phase noise, figureFileSmall=3IP3V7tvkJV3g5dHFDxMGQ==, figureFileBig=RglEeH54DUGbVlPw9rO+zw==, tableContent=null), ArticleFig(id=1319955146344349973, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=CN, label=图5, caption=
不同强度相位噪声影响下zs和zw的标准差, figureFileSmall=3IP3V7tvkJV3g5dHFDxMGQ==, figureFileBig=RglEeH54DUGbVlPw9rO+zw==, tableContent=null), ArticleFig(id=1319955146419847446, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=EN, label=Fig.6, caption=
The influence of different single-peak absorption spectra on the measurement results. (a) Transmittance curves; (b) Standard deviations of zs and zw, figureFileSmall=quU6rHZRcRi9VusHBKC8Qw==, figureFileBig=O/TF+BwMswTHXWsvoJF/2Q==, tableContent=null), ArticleFig(id=1319955146533093655, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=CN, label=图6, caption=
不同单峰吸收谱对测量结果的影响。 (a) 透射率曲线; (b) zs和zw的标准差, figureFileSmall=quU6rHZRcRi9VusHBKC8Qw==, figureFileBig=O/TF+BwMswTHXWsvoJF/2Q==, tableContent=null), ArticleFig(id=1319955146600202520, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=EN, label=Fig.7, caption=
The influence of different double-peak absorption spectra on the measurement results. (a) Transmittance curve; (b) Standard deviations of zs and zw, figureFileSmall=NT3kUg2ndQqhy091iWxYAQ==, figureFileBig=4Ifin5q6KqmpZ3GwBLl0QQ==, tableContent=null), ArticleFig(id=1319955146688282905, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=CN, label=图7, caption=
不同双峰吸收光谱对测量结果的影响。 (a) 透射率曲线; (b) zs和zw的标准差, figureFileSmall=NT3kUg2ndQqhy091iWxYAQ==, figureFileBig=4Ifin5q6KqmpZ3GwBLl0QQ==, tableContent=null), ArticleFig(id=1319955146780557594, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=EN, label=Fig.8, caption=
The influence of absorption spectra with different widths on the measurement results. (a) Transmittance curve; (b) Standard deviations of zs and zw, figureFileSmall=JEtTdNLMLWr9FLwjEJ1V+g==, figureFileBig=+/QZag3dOsQSEBZbxopCVg==, tableContent=null), ArticleFig(id=1319955146860249371, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=CN, label=图8, caption=
不同吸收光谱宽度对测量结果的影响。 (a) 透射率曲线; (b) zs和zw的标准差, figureFileSmall=JEtTdNLMLWr9FLwjEJ1V+g==, figureFileBig=+/QZag3dOsQSEBZbxopCVg==, tableContent=null), ArticleFig(id=1319955146944135452, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=EN, label=Fig.9, caption=
Experimental setup parameters. (a) Light source spectrum; (b) Phase noise distribution, figureFileSmall=/4KTWmpJtsMotdTWiw5ejA==, figureFileBig=uAHB0FKrJv9mcEWK+vzONg==, tableContent=null), ArticleFig(id=1319955147057381661, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=CN, label=图9, caption=
实验装置参数。 (a) 光源光谱分布; (b)相位噪声分布, figureFileSmall=/4KTWmpJtsMotdTWiw5ejA==, figureFileBig=uAHB0FKrJv9mcEWK+vzONg==, tableContent=null), ArticleFig(id=1319955147128684830, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=EN, label=Fig.10, caption=
White light interference signal detected from a single pixel and its amplitude and phase distribution in the wavenumber domain. (a) White light interference signal; (b) Amplitude distribution; (c) Phase distribution, figureFileSmall=zGtgBAcois/m/Ob1VEtwmw==, figureFileBig=f5bjeOwa/UvQG/iGKItYFw==, tableContent=null), ArticleFig(id=1319955147208376607, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=CN, label=图10, caption=
单个像素探测的白光干涉信号和其在波数域的振幅和相位分布。 (a)白光干涉信号; (b) 振幅分布; (c) 相位分布, figureFileSmall=zGtgBAcois/m/Ob1VEtwmw==, figureFileBig=f5bjeOwa/UvQG/iGKItYFw==, tableContent=null), ArticleFig(id=1319955147279679776, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=EN, label=Fig.11, caption=
Surface profiles of the wedge-shaped window obtained by FDA and AOFDA methods. (a) C=0.1; (b) C=0.3; (c) C=0.5; (d) C=0.7; (e) C=0.9; (f) AOFDA, figureFileSmall=42+HwEc8awSM2MSTh4eYOw==, figureFileBig=J6mggIJIHBSFaOwcLA+itA==, tableContent=null), ArticleFig(id=1319955147355177249, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=CN, label=图11, caption=
通过FDA和AOFDA方法得到的楔形窗口表面轮廓。 (a) C=0.1; (b) C=0.3; (c) C=0.5; (d) C=0.7; (e) C=0.9; (f) AOFDA, figureFileSmall=42+HwEc8awSM2MSTh4eYOw==, figureFileBig=J6mggIJIHBSFaOwcLA+itA==, tableContent=null), ArticleFig(id=1319955147439063330, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=EN, label=Fig.12, caption=
The standard deviation of the measured value zw and zs corresponding to different coefficients C, figureFileSmall=4IINBv9MvHgb0VV7Xqo2Uw==, figureFileBig=2S7r8T314kROGMCn2KgPvg==, tableContent=null), ArticleFig(id=1319955147602641187, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=CN, label=图12, caption=
测量值zw和不同系数C得到的zs的标准差, figureFileSmall=4IINBv9MvHgb0VV7Xqo2Uw==, figureFileBig=2S7r8T314kROGMCn2KgPvg==, tableContent=null), ArticleFig(id=1319955147879465252, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=EN, label=Fig.13, caption=
Step surface profile measured by FDA (C=0.5) and AOFDA methods. (a) Surface profile of the step obtained through FDA; (b) Surface profile along the X=100 direction in (a); (c) Surface profile of the step obtained through AOFDA; (d) Surface profile along the X=100 direction in (c), figureFileSmall=z421k9Ux+xGuV7H1sXO9eg==, figureFileBig=AFqeSZmkR4d9kpGYmJ+dqQ==, tableContent=null), ArticleFig(id=1319955147967545637, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=CN, label=图13, caption=
通过FDA (C=0.5)和AOFDA方法测量的台阶表面形貌。 (a) 通过FDA (C=0.5)得到的台阶表面形貌; (b) 图 (a)中沿X=100方向的表面轮廓; (c) 通过AOFDA得到的台阶表面形貌; (d) 图 (c)中沿X=100方向的表面轮廓, figureFileSmall=z421k9Ux+xGuV7H1sXO9eg==, figureFileBig=AFqeSZmkR4d9kpGYmJ+dqQ==, tableContent=null), ArticleFig(id=1319955148051431718, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=EN, label=Tab.1, caption=
Root mean square Sq and maximum height Sz of surface profiles
, figureFileSmall=null, figureFileBig=null, tableContent=
| Measurement method | Coefficient | Sz/nm | Sq/nm |
|---|
| FDA | C=0.1 | 120.2 | 18.4 |
| C=0.3 | 79.3 | 11.3 |
| C=0.5 | 50.2 | 6.7 |
| C=0.7 | 62.5 | 7.6 |
| C=0.9 | 68.6 | 9.0 |
| AOFDA | − | 34.6 | 5.5 |
), ArticleFig(id=1319955148235981095, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=CN, label=表1, caption=
表面轮廓的均方根Sq和最大高度Sz
, figureFileSmall=null, figureFileBig=null, tableContent=
| Measurement method | Coefficient | Sz/nm | Sq/nm |
|---|
| FDA | C=0.1 | 120.2 | 18.4 |
| C=0.3 | 79.3 | 11.3 |
| C=0.5 | 50.2 | 6.7 |
| C=0.7 | 62.5 | 7.6 |
| C=0.9 | 68.6 | 9.0 |
| AOFDA | − | 34.6 | 5.5 |
), ArticleFig(id=1319955148328255784, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=EN, label=Tab.2, caption=
Step height and repeatability obtained by different methods
, figureFileSmall=null, figureFileBig=null, tableContent=
| Measurement method | Coefficient | Step height/μm | Repeatability/nm |
|---|
| FDA | C=0.1 | 2.9478 | 81.0 |
| C=0.3 | 2.9658 | 34.5 |
| C=0.5 | 2.9566 | 19.4 |
| C=0.7 | 2.9660 | 20.3 |
| C=0.9 | 2.9623 | 23.3 |
| AOFDA | − | 3.0054 | 17.9 |
), ArticleFig(id=1319955148403753257, tenantId=1146029695717560320, journalId=1278651732997652489, articleId=1319955120004120647, language=CN, label=表2, caption=
不同方法得到的台阶高度和重复率
, figureFileSmall=null, figureFileBig=null, tableContent=
| Measurement method | Coefficient | Step height/μm | Repeatability/nm |
|---|
| FDA | C=0.1 | 2.9478 | 81.0 |
| C=0.3 | 2.9658 | 34.5 |
| C=0.5 | 2.9566 | 19.4 |
| C=0.7 | 2.9660 | 20.3 |
| C=0.9 | 2.9623 | 23.3 |
| AOFDA | − | 3.0054 | 17.9 |
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