The comparison of different temporal phase analysis algorithms in optical dynamic measurement
In recent years, optical interferometry has been applied to whole-field, non-contact measurement of vibrating or continuously-deforming objects. In optical dynamic measurement, an interferogram sequence is obtained by a highspeed camera. Retrieving dynamic phase values from this interferogram sequen...
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المؤلفون الرئيسيون: | , |
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مؤلفون آخرون: | |
التنسيق: | Conference or Workshop Item |
اللغة: | English |
منشور في: |
2010
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الموضوعات: | |
الوصول للمادة أونلاين: | https://hdl.handle.net/10356/91915 http://hdl.handle.net/10220/6480 |
الوسوم: |
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المؤسسة: | Nanyang Technological University |
اللغة: | English |
الملخص: | In recent years, optical interferometry has been applied to whole-field, non-contact measurement of vibrating or continuously-deforming objects. In optical dynamic measurement, an interferogram sequence is obtained by a highspeed camera. Retrieving dynamic phase values from this interferogram sequence leads to a precise measurement of different kinematic and deformation parameters of a continuously-deforming or vibrating object. In this paper, this interferogram sequence is classified into two types: (i) intensity variation; and (ii) exponential phase signal. Different temporal phase retrieving techniques, such as Hilbert transform, Fourier transform, windowed Fourier transform and wavelet transform are applied to extract the phase from a simulated signal. The advantage and drawback of each algorithm are discussed. In addition, a new method based on the combination of Fourier transform and windowed Fourier transform is proposed and the simulation shows it can eliminate the noise and evaluate the phase more accurately. |
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