Off-axis digital holographic phase compensation recovery method based on Gaussian filtering

A novel approach utilizing a Gaussian filtering is presented to eliminate aberrations in the phase recovery for off-axis digital holography. After applying the Fourier-transform-based method to the off-axis hologram, a complex amplitude map containing object phase and phase aberrations can be obtained. A Gaussian filter is then employed to extract the phase aberrations map from the complex amplitude map. In this case, the object phase can be reconstructed through a division between the complex amplitude map and the phase aberration map. The proposed method does not require the sample-free hologram containing aberration information and avoids complex procedures such as surface fitting or spectral filtering. Experimental result shows that the proposed method can realize accurate and fast off-axis digital holographic phase compensation recovery.