23 June 1995 Three-dimensional deformation measurement by holographic interferometry with phase-shifting technology
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Abstract
Three dimensional deformation measurement by holographic interferometry with phase shifting technology is presented. The two-reference-beam holography is applied with phase shift to improve the accuracy in optical phase difference measurement. A least squares algorithm is proposed to substitute the Stetson's algorithm in the calculation of the unknown constant phases in these interferograms. Comparisons of the deformations solved by these two algorithms for the same measured optical phase differences are shown. The results show that the local error in phase measurement has less effect on the final deformation solved by the new algorithm than by the Stetson's algorithm.
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Wei Shen, Wei Shen, Sei-Han Liao, Sei-Han Liao, Ming-Wen Chang, Ming-Wen Chang, } "Three-dimensional deformation measurement by holographic interferometry with phase-shifting technology", Proc. SPIE 2545, Interferometry VII: Applications, (23 June 1995); doi: 10.1117/12.212630; https://doi.org/10.1117/12.212630
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