Measurement of angle of rotation using circular optical grating

In 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 or a computer-controlled LCD proje...

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Main Authors: Shang, H. M., Toh, S. L., Quan, Chenggen, Tay, Cho Jui, Fu, Yu
Other Authors: Second International Conference on Experimental Mechanics (Singapore)
Format: Conference or Workshop Item
Language:English
Published: 2010
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Online Access:https://hdl.handle.net/10356/92035
http://hdl.handle.net/10220/6477
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-920352020-09-26T22:15:36Z Measurement of angle of rotation using circular optical grating Shang, H. M. Toh, S. L. Quan, Chenggen Tay, Cho Jui Fu, Yu Second International Conference on Experimental Mechanics (Singapore) Temasek Laboratories DRNTU::Science::Physics::Optics and light In 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 or a 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 opaque screen and the CCD camera subsequently records the grating image off this screen. Published version 2010-11-26T08:04:49Z 2019-12-06T18:16:10Z 2010-11-26T08:04:49Z 2019-12-06T18:16:10Z 2001 2001 Conference Paper Shang, H. M., Toh, S. L., Fu, Y., Quan, C., Tay, C. J. (2001). Measurement of angle of rotation using circular optical grating. Proceedings of the Second International Conference on Experimental Mechanics, 4317, pp.72-75. https://hdl.handle.net/10356/92035 http://hdl.handle.net/10220/6477 10.1117/12.429549 en Copyright 2001 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. application/pdf
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic DRNTU::Science::Physics::Optics and light
spellingShingle DRNTU::Science::Physics::Optics and light
Shang, H. M.
Toh, S. L.
Quan, Chenggen
Tay, Cho Jui
Fu, Yu
Measurement of angle of rotation using circular optical grating
description In 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 or a 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 opaque screen and the CCD camera subsequently records the grating image off this screen.
author2 Second International Conference on Experimental Mechanics (Singapore)
author_facet Second International Conference on Experimental Mechanics (Singapore)
Shang, H. M.
Toh, S. L.
Quan, Chenggen
Tay, Cho Jui
Fu, Yu
format Conference or Workshop Item
author Shang, H. M.
Toh, S. L.
Quan, Chenggen
Tay, Cho Jui
Fu, Yu
author_sort Shang, H. M.
title Measurement of angle of rotation using circular optical grating
title_short Measurement of angle of rotation using circular optical grating
title_full Measurement of angle of rotation using circular optical grating
title_fullStr Measurement of angle of rotation using circular optical grating
title_full_unstemmed Measurement of angle of rotation using circular optical grating
title_sort measurement of angle of rotation using circular optical grating
publishDate 2010
url https://hdl.handle.net/10356/92035
http://hdl.handle.net/10220/6477
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