Numerical reconstruction of digital holograms for three-dimensional shape measurement

作者：Ma Lihong; Wang Hui; Li Yong; Jin Hongzhen

来源：Journal of Optics A: Pure and Applied Optics , 2004, 6(4): 396-400.

DOI：10.1088/1464-4258/6/4/016

• 3D reconstruction image
• 3D shape measurement
• Digital holography
• Maximum focus measure

In this paper, we present a new technique for 3D shape measurement by recovering the 3D numerical reconstruction image of a digital hologram. Firstly, we fabricate a Fresnel digital hologram. Then, a number of 2D light field intensity distributions, which are in the reconstructed field of the digital hologram, are computed on the different depth planes. Finally, the focus measure evaluation of the grey level variance is applied. By finding the maximum focus measure, we decide on the depth information of each small image patch. The experiment confirms that the technique can materialize the 3D rebuilding of the reconstruction image and obtain 3D profile information on the object recorded. So digital holography can be a very promising technology for non-destructive 3D shape measurement.

• 出版日期2004