Noncontact Measurement for Radius of Curvature of Unpolished Lens
A noncontact mathematical model to measure radius of curvature (ROC) of an unpolished spherical lens was proposed and also proved by experiments. This model gives ROC as a function of arcs radii and their separation distance, where the radii of the corresponding arcs could be acquired by taking coor...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | International Journal of Optics |
| Online Access: | http://dx.doi.org/10.1155/2014/324032 |
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| _version_ | 1850213972087668736 |
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| author | Haifeng Liang |
| author_facet | Haifeng Liang |
| author_sort | Haifeng Liang |
| collection | DOAJ |
| description | A noncontact mathematical model to measure radius of curvature (ROC) of an unpolished spherical lens was proposed and also proved by experiments. This model gives ROC as a function of arcs radii and their separation distance, where the radii of the corresponding arcs could be acquired by taking coordinates of points on the arcs when two parallel lines of light project onto a lens surface. Our experiments demonstrated that the measured maximum relative error was 0.027% for a concave surface with a 38.19 mm ROC and 0.021% for a convex surface with a 97.75 mm ROC, which were all in agreement with those of theory prediction error. The suggested method presented a fast noncontact method for testing ROC of lens during coarse grinding and fine grinding. |
| format | Article |
| id | doaj-art-87bae1f8abf14255b98d7b591b1b8b4b |
| institution | OA Journals |
| issn | 1687-9384 1687-9392 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Optics |
| spelling | doaj-art-87bae1f8abf14255b98d7b591b1b8b4b2025-08-20T02:09:01ZengWileyInternational Journal of Optics1687-93841687-93922014-01-01201410.1155/2014/324032324032Noncontact Measurement for Radius of Curvature of Unpolished LensHaifeng Liang0College of Photoelectrical Engineering, Xi’an Technological University, Xi’an 710032, ChinaA noncontact mathematical model to measure radius of curvature (ROC) of an unpolished spherical lens was proposed and also proved by experiments. This model gives ROC as a function of arcs radii and their separation distance, where the radii of the corresponding arcs could be acquired by taking coordinates of points on the arcs when two parallel lines of light project onto a lens surface. Our experiments demonstrated that the measured maximum relative error was 0.027% for a concave surface with a 38.19 mm ROC and 0.021% for a convex surface with a 97.75 mm ROC, which were all in agreement with those of theory prediction error. The suggested method presented a fast noncontact method for testing ROC of lens during coarse grinding and fine grinding.http://dx.doi.org/10.1155/2014/324032 |
| spellingShingle | Haifeng Liang Noncontact Measurement for Radius of Curvature of Unpolished Lens International Journal of Optics |
| title | Noncontact Measurement for Radius of Curvature of Unpolished Lens |
| title_full | Noncontact Measurement for Radius of Curvature of Unpolished Lens |
| title_fullStr | Noncontact Measurement for Radius of Curvature of Unpolished Lens |
| title_full_unstemmed | Noncontact Measurement for Radius of Curvature of Unpolished Lens |
| title_short | Noncontact Measurement for Radius of Curvature of Unpolished Lens |
| title_sort | noncontact measurement for radius of curvature of unpolished lens |
| url | http://dx.doi.org/10.1155/2014/324032 |
| work_keys_str_mv | AT haifengliang noncontactmeasurementforradiusofcurvatureofunpolishedlens |