Self-calibrating phase shifting shadow moiré technique

Hubing Du; Jianhong Yu; Shaofeng Zhang

doi:10.1117/12.2511924

7 March 2019 Self-calibrating phase shifting shadow moiré technique

Hubing Du, Jianhong Yu, Shaofeng Zhang

Proceedings Volume 11053, Tenth International Symposium on Precision Engineering Measurements and Instrumentation; 110532H (2019) https://doi.org/10.1117/12.2511924
Event: 10th International Symposium on Precision Engineering Measurements and Instrumentation (ISPEMI 2018), 2018, Kunming, China

Abstract

The phase shifting shadow moiré is an efficient technique for 3-D shape measurement. Our recent research focuses on improving its measurement accuracy without addition the complication of the experimental set-up. Considering that the existing measurement process of shifting shadow moiré technique is complex, we had been looking for ways to make it easier. In this paper we propose some effective techniques to fulfil the aim. In the proposed method, the binocular stereovision technique is used to calibrate the geometric parameters of our setup. Then a method is developed to determine the grating translation difference. After that an iterative self-tuning algorithm is use to retrieve the accurate phase. The proposed method is fast and can be implemented easily in many applications. Optical experiments are implemented to verify the feasibility of this method.

Citation Download Citation

Hubing Du, Jianhong Yu, and Shaofeng Zhang "Self-calibrating phase shifting shadow moiré technique ", Proc. SPIE 11053, Tenth International Symposium on Precision Engineering Measurements and Instrumentation, 110532H (7 March 2019); https://doi.org/10.1117/12.2511924

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