{"title":"Optical signal processing for shape measurement","authors":"J. H. Lim, M. Ratnam","doi":"10.1109/ISSPA.2001.950178","DOIUrl":null,"url":null,"abstract":"A set of optical signal data generated by shadow moire interferometry represents the profile of the surface that is under investigation. An existing algorithm has been used to process and visualize the optical signal into the three dimensional surface plot and a two-dimensional representation for a cantilever. This algorithm was tested and calibrated by measuring a cylinder surface profile and comparing the result with the actual measurement. An error analysis shows that distortion of the imaging system and the uncollimated light source are two major factors that may contribute to error in the analysis. Finally, an experiment was carried out to measure the deflection of a cantilever and the result is compared with the shape obtained from deflection theory.","PeriodicalId":236050,"journal":{"name":"Proceedings of the Sixth International Symposium on Signal Processing and its Applications (Cat.No.01EX467)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the Sixth International Symposium on Signal Processing and its Applications (Cat.No.01EX467)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISSPA.2001.950178","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
A set of optical signal data generated by shadow moire interferometry represents the profile of the surface that is under investigation. An existing algorithm has been used to process and visualize the optical signal into the three dimensional surface plot and a two-dimensional representation for a cantilever. This algorithm was tested and calibrated by measuring a cylinder surface profile and comparing the result with the actual measurement. An error analysis shows that distortion of the imaging system and the uncollimated light source are two major factors that may contribute to error in the analysis. Finally, an experiment was carried out to measure the deflection of a cantilever and the result is compared with the shape obtained from deflection theory.
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