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Article: Development of an instrument for measuring curvature of lens

TitleDevelopment of an instrument for measuring curvature of lens
Authors
KeywordsAuto-Measuring System
Curvature Measurement
Edge Detection
Newton's Rings
Issue Date2006
PublisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://www.spie.org/app/Publications/index.cfm?fuseaction=proceedings
Citation
Proceedings of SPIE - The International Society for Optical Engineering, 2006, v. 6150 I How to Cite?
AbstractA new edge detection method based on nonlinear fitting is used in the measurement of the curvature of lens in this paper. Non-contact Newton's rings are formed by an interferometer. In order to detect the diameters of dark rings and calculate the lens radius of curvature, the edge detection method is used for the image process. The auto-measuring system of lens curvature captures the gray scale image by CMOS image sensor, and then processes the data and calculates the position by a microprocessor. The scale of image pixels corresponding to Newton's rings that are related to the radius of curvature is obtained by scanning fringes or other optical methods. The accuracy of measurement is better than 0.3 percent.
Persistent Identifierhttp://hdl.handle.net/10722/91071
ISSN
References

 

DC FieldValueLanguage
dc.contributor.authorTan, Cen_HK
dc.contributor.authorLin, Ben_HK
dc.contributor.authorChen, Ben_HK
dc.contributor.authorCao, Xen_HK
dc.contributor.authorPan, Ten_HK
dc.contributor.authorJin, Wen_HK
dc.date.accessioned2010-09-17T10:12:36Z-
dc.date.available2010-09-17T10:12:36Z-
dc.date.issued2006en_HK
dc.identifier.citationProceedings of SPIE - The International Society for Optical Engineering, 2006, v. 6150 Ien_HK
dc.identifier.issn0277-786Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/91071-
dc.description.abstractA new edge detection method based on nonlinear fitting is used in the measurement of the curvature of lens in this paper. Non-contact Newton's rings are formed by an interferometer. In order to detect the diameters of dark rings and calculate the lens radius of curvature, the edge detection method is used for the image process. The auto-measuring system of lens curvature captures the gray scale image by CMOS image sensor, and then processes the data and calculates the position by a microprocessor. The scale of image pixels corresponding to Newton's rings that are related to the radius of curvature is obtained by scanning fringes or other optical methods. The accuracy of measurement is better than 0.3 percent.en_HK
dc.languageengen_HK
dc.publisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://www.spie.org/app/Publications/index.cfm?fuseaction=proceedingsen_HK
dc.relation.ispartofProceedings of SPIE - The International Society for Optical Engineeringen_HK
dc.subjectAuto-Measuring Systemen_HK
dc.subjectCurvature Measurementen_HK
dc.subjectEdge Detectionen_HK
dc.subjectNewton's Ringsen_HK
dc.titleDevelopment of an instrument for measuring curvature of lensen_HK
dc.typeArticleen_HK
dc.identifier.emailLin, B:blin@hku.hken_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1117/12.677962en_HK
dc.identifier.scopuseid_2-s2.0-33645316808en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33645316808&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume6150 Ien_HK

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