In order to theoretically analyze and estimate the decorrelation error in digital holographic interferometry, general point spread function (PSF) of digital holographic system was derived and its approximate function was obtained. Then complex magnitudes of the same point were analyzed with the theory of statistical optics and the statistical properties of the decorrelation error were obtained in double exposure holographic interferometry, which were simulated in MATLAB finally. Simulation results indicate that the statistical properties of the decorrelation error obtained through theory analysis correspond with the decorrelation phenomenon, and the measuring condition in digital holography interferometry is that: the decorrelation degrees between the holographies of every double exposures should satisfy the limit of ρx+ρy < 0.1.
Theoretical analysis and simulation of decorrelation error in digital holographic interferometry
Zhu L.;
2010-01-01
Abstract
In order to theoretically analyze and estimate the decorrelation error in digital holographic interferometry, general point spread function (PSF) of digital holographic system was derived and its approximate function was obtained. Then complex magnitudes of the same point were analyzed with the theory of statistical optics and the statistical properties of the decorrelation error were obtained in double exposure holographic interferometry, which were simulated in MATLAB finally. Simulation results indicate that the statistical properties of the decorrelation error obtained through theory analysis correspond with the decorrelation phenomenon, and the measuring condition in digital holography interferometry is that: the decorrelation degrees between the holographies of every double exposures should satisfy the limit of ρx+ρy < 0.1.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
