Please use this identifier to cite or link to this item: https://doi.org/10.1117/12.429549
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dc.titleMeasurement of angle of rotation using circular optical grating
dc.contributor.authorShang, H.M.
dc.contributor.authorToh, S.L.
dc.contributor.authorFu, Y.
dc.contributor.authorQuan, C.
dc.contributor.authorTay, C.J.
dc.date.accessioned2014-06-19T05:36:58Z
dc.date.available2014-06-19T05:36:58Z
dc.date.issued2001
dc.identifier.citationShang, H.M., Toh, S.L., Fu, Y., Quan, C., Tay, C.J. (2001). Measurement of angle of rotation using circular optical grating. Proceedings of SPIE - The International Society for Optical Engineering 4317 : 72-78. ScholarBank@NUS Repository. https://doi.org/10.1117/12.429549
dc.identifier.issn0277786X
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/73589
dc.description.abstractIn this paper, a simple method is described for the measurement of small angles of rotation of a flat surface using a circular optical grating, which may be generated and projected onto the test surface using either a standard Michelson interferometer ora computer-controlled LCD projector. In view of its availability in most laboratories, a Michelson interferometer is used in this paper. The diameter of the grating that is generated can be easily magnified or be reduced to suit the size of the test surface. With circular grating, the angular rotation of both diffuse and specularly reflective surfaces about any axis of rotation can be measured from the distortion of the grating. The distorted grating that is diffracted from a specularly reflective surface may be recorded in two different ways using a CCD camera. In the first method, the distorted grating is recorded off the mirror surface as though it were a diffuse surface. In the second method, the distorted grating is specularly reflected onto an opaqu e screen and the CCD camera subsequently records the grating image off this screen.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1117/12.429549
dc.sourceScopus
dc.subjectCCD camera
dc.subjectCircular optical grating
dc.subjectLCD projector
dc.subjectMichelson interferometer
dc.subjectSmall angles of rotation
dc.typeConference Paper
dc.contributor.departmentMECHANICAL ENGINEERING
dc.description.doi10.1117/12.429549
dc.description.sourcetitleProceedings of SPIE - The International Society for Optical Engineering
dc.description.volume4317
dc.description.page72-78
dc.description.codenPSISD
dc.identifier.isiut000171040900012
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