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Proceedings Paper

Precision measurement of angle using digital speckle pattern interferometry
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Paper Abstract

A non-contact and non-cooperative method of angle measurement based on digital speckle pattern interferometry (DSPI) was introduced in this paper. Studies have shown that when the illumination angle of the DSPI system was every small, the angle can be determined according to the interferometric phase distribution and the length of the measured object. Thereby a direct relationship between the angle and the phase distribution was established. In our experiments, the resolution of measurement system was 0.00025° ( 0.9”), proving that the proposed method is effective for measuring small angles. Theoretically, this method can achieve higher resolution if the measurement noise can be minimized.

Paper Details

Date Published: 13 November 2019
PDF: 6 pages
Proc. SPIE 11343, Ninth International Symposium on Precision Mechanical Measurements, 113431H (13 November 2019); doi: 10.1117/12.2548726
Show Author Affiliations
Fan Wu, Beijing Information Science and Technology Univ. (China)
Sijin Wu, Beijing Information Science and Technology Univ. (China)
Weixian Li, Beijing Information Science and Technology Univ. (China)
Xin Li, Beijing Information Science and Technology Univ. (China)


Published in SPIE Proceedings Vol. 11343:
Ninth International Symposium on Precision Mechanical Measurements
Liandong Yu, Editor(s)

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