Sensitivity improvement in phase-shifted moir[e-acute] interferometry using 1-D continuous wavelet transform image processing

by: Heng Liu, Alexander N Cartwright, Cemal Basaran

Optical Engineering, Vol. 42, No. 9. (2003), pp. 2646-2652.

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Abstract

A method to accurately determine the relative phase between images acquired using phase-shifted moiré interferometry is presented. Phase shifting, combined with the accurate determination of the relative phase shift, provides an improvement of the sensitivity of moiré interferometry from 0.417 µm/fringe to 27.8 nm/fringe. Specifically, a 1-D continuous wavelet transform technique was developed to effectively reduce the transient environmentally induced noise and the static background noise that complicate phase determination. Using this technique, accurate relative phase shifts of the interferogram frames were determined with an error of [approximate]2%. As a result, very smooth and accurate phase-map reconstruction of the initially noisy interferogram was accomplished.

@article{citeulike:2948360, abstract = {A method to accurately determine the relative phase between images acquired using phase-shifted moir\'{e} interferometry is presented. Phase shifting, combined with the accurate determination of the relative phase shift, provides an improvement of the sensitivity of moir\'{e} interferometry from 0.417 µm/fringe to 27.8 nm/fringe. Specifically, a 1-D continuous wavelet transform technique was developed to effectively reduce the transient environmentally induced noise and the static background noise that complicate phase determination. Using this technique, accurate relative phase shifts of the interferogram frames were determined with an error of [approximate]2\%. As a result, very smooth and accurate phase-map reconstruction of the initially noisy interferogram was accomplished.}, author = {Liu, Heng and Cartwright, Alexander N. and Basaran, Cemal }, citeulike-article-id = {2948360}, doi = {10.1117/1.1592803}, journal = {Optical Engineering}, keywords = {1d, algorithm, continuous, interferogram, phase-shift, transform, wavelet}, number = {9}, pages = {2646--2652}, posted-at = {2008-07-01 14:40:58}, priority = {2}, publisher = {SPIE}, title = {Sensitivity improvement in phase-shifted moir[e-acute] interferometry using 1-D continuous wavelet transform image processing}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=OPEGAR000042000009002646000001\&idtype=cvips\&gifs=yes}, volume = {42}, year = {2003} }

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TY - JOUR ID - citeulike:2948360 L3 - citeulike-article-id:2948360 TI - Sensitivity improvement in phase-shifted moir[e-acute] interferometry using 1-D continuous wavelet transform image processing JF - Optical Engineering VL - 42 IS - 9 SP - 2646 EP - 2652 PB - SPIE N2 - A method to accurately determine the relative phase between images acquired using phase-shifted moiré interferometry is presented. Phase shifting, combined with the accurate determination of the relative phase shift, provides an improvement of the sensitivity of moiré interferometry from 0.417 µm/fringe to 27.8 nm/fringe. Specifically, a 1-D continuous wavelet transform technique was developed to effectively reduce the transient environmentally induced noise and the static background noise that complicate phase determination. Using this technique, accurate relative phase shifts of the interferogram frames were determined with an error of [approximate]2%. As a result, very smooth and accurate phase-map reconstruction of the initially noisy interferogram was accomplished. KW - 1d KW - algorithm KW - continuous KW - interferogram KW - phase-shift KW - transform KW - wavelet AU - Liu, Heng AU - Cartwright, Alexander AU - Basaran, Cemal PY - 2003/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=OPEGAR000042000009002646000001&idtype=cvips&gifs=yes ER -

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