论文信息 - Application of complex-lag distributions for estimation of arbitrary order phase derivatives in digital holographic interferometry.

Application of complex-lag distributions for estimation of arbitrary order phase derivatives in digital holographic interferometry.

This Letter proposes a method to estimate phase derivatives of arbitrary order in digital holographic interferometry. Based on the desired order, the generalized complex-lag distribution is computed from the reconstructed interference field. Subsequently, the phase derivative is estimated by tracing the peak of the distribution. Simulation and experimental results are presented to validate the method's potential.

Pramod Rastogi | Gannavarpu Rajshekhar

[1] Qian Kemao,et al. Two-dimensional windowed Fourier transform for fringe pattern analysis: Principles, applications and implementations , 2007 .

[2] Cornel Ioana,et al. Generalized Representation of Phase Derivatives for Regular Signals , 2007, IEEE Transactions on Signal Processing.

[3] Cesar A. Sciammarella,et al. Determination of strains from fringe patterns using space-frequency representations , 2003 .

[4] G Rajshekhar,et al. Estimation of displacement derivatives in digital holographic interferometry using a two-dimensional space-frequency distribution. , 2010, Optics express.

[5] L R Watkins,et al. Determination of interferometer phase distributions by use of wavelets. , 1999, Optics letters.

[6] G Rajshekhar,et al. Strain, curvature, and twist measurements in digital holographic interferometry using pseudo-Wigner-Ville distribution based method. , 2009, The Review of scientific instruments.