Three-dimensional deformation measurement by holographic interferometry with phase-shifting technology

Wei Shen; Sei-Han Liao; Ming-Wen Chang

doi:10.1117/12.212630

23 June 1995 Three-dimensional deformation measurement by holographic interferometry with phase-shifting technology

Wei Shen, Sei-Han Liao, Ming-Wen Chang

Proceedings Volume 2545, Interferometry VII: Applications; (1995) https://doi.org/10.1117/12.212630
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

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.

Citation Download Citation

Wei Shen, Sei-Han Liao, and Ming-Wen Chang "Three-dimensional deformation measurement by holographic interferometry with phase-shifting technology", Proc. SPIE 2545, Interferometry VII: Applications, (23 June 1995); https://doi.org/10.1117/12.212630

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