塑料眼镜内外缺陷检测的全内反射照明技术.docx

第19卷第9期2011年9月

光学精密工程

OpticsandPrecisionEngineering

Vol.19No.9Sep.2011

文章编号1004-924X(2011)09-2247-08

塑料眼镜内外缺陷检测的全内反射照明技术

ZHAOLi-ping*,LIXiang,FANGZhong-ping

(PrecisionMeasurementsGroup,SingaporeInstituteofTechnologicalUniversity

71NanyangDrive,Singapore638075)

摘要：考虑目前大多数塑料眼镜镜片和光学表面的缺陷检测仍由人工完成，研究了基于全内反射照明的暗场检测技术，以提高用机器视觉进行自动缺陷检测的可见度及对比度，设计了镜头检测原型系统用于增强缺陷信号的强度并降低表面浮尘的干扰。利用设计的原型系统进行了试验测试并对自动缺陷检测结果与人工检测结果进行比较，结果验证了这种暗场全内反射检测技术的可行性。

关键词：塑料眼镜镜片；缺陷检测；机器视觉；全内反射

中图分类号：TH703;TS959.6文献标识码：Adoi:10.3788/OPE2247

TIRilluminationtechnologyfordefectinspectionofplasticophthalmiclenses

ZHAOLi-ping*,LIXiang,FANGZhong-ping

(PrecisionMeasurementsGroup,SingaporeInstituteofTechnologicalUniversity

71NanyangDrive,Singapore638075)

*Correspondingauthor,E-mail:lpzhao@.sg

Abstract:Currentlymostplasticlensesandopticalsurfacesarestillinspecteddirectlybyeyesbyin-spectors.Inthispaper,aTotalInternalReflection(TIR)illuminationbaseddark-fieldinspectionisanalyzedanddesignedtoenhancethevisibilityandcontrastofthedefectsonthetwosurfacesofandinsidetheplasticlenses,andalensinspectionprototypeisdeveloped.Sometrialtestingshavebeenconductedwiththeprototype,andthetestingresultsarecomparedwiththoseobtainedfrommanualinspectiondirectlyoperatedbyinspectors.TheTILdark-fieldinspectiontechniqueandfeasibilitytodetectthepopulardefectsofplasticophthalmiclensesareverifiedandevaluated.

Keywords:plasticophthalmiclens;defectinspection;machinevision;TotalInternal