16 May 2018 Error-correct arithmetic for angular displacement measurement with single linear image detector
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Abstract
This paper proposes a grating eccentricity error correction technique for high-precision angular measurement via image processing. We first built a mathematical model of grating eccentricity error, then we established an error-correct arithmetic based on the least square method. We tested the proposed method to find that it yields a standard error deviation of only 6.33″, compared to the uncorrected standard error deviation of 22.33″. This method is based on a single detector, which is inexpensive and performs well. The results presented here may provide a theoretical and technological foundation for further research on small-size, high-resolution photographic rotary encoders.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Hai Yu, Qiuhua Wan, Xinran Lu, Yingcai Du, Changhai Zhao, "Error-correct arithmetic for angular displacement measurement with single linear image detector," Optical Engineering 57(5), 054108 (16 May 2018). https://doi.org/10.1117/1.OE.57.5.054108 Submission: Received 9 March 2018; Accepted 2 May 2018
Submission: Received 9 March 2018; Accepted 2 May 2018
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