Abstract
In this paper, 3-D reconstruction images from digital hologram have been improved by using deconvolution technique. The purpose of the present study is to improve the performance of particle measurement method based on digital holography. This can be applied to 3-D velocity measurement by PIV or PTV. The recording and the reconstruction processes of digital holography are theoretically expressed by using Fresnel-Kirchhoff formula in convolution representation. Reconstructed particles images are expanded in depth direction more than the actual ones. Furthermore, it is assumed that the expanded particle image is shown by the convolution of the actual particle and expansion function (three dimensional PSF). Thus, the actual particles can be obtained by deconvolution with the PSF and the reconstructed images. It is shown in numerical simulation that the accuracy of particle position can be improved for both cases with multiple scattering and non multiple one.
