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10 September 2007 3D phase object measurement using an off-axis Fresnel hologram
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Abstract
We develop a novel holographic reconstruction method that requires only an off-axis Fresnel digital hologram without the need for additional phase-retrieval elements in the experimental setup. With this approach we can reconstruct numerical phase profiles without twin-image blurring, using only an off-axis digital hologram. Furthermore numerical reconstruction and twin-image suppression can be rapidly accomplished with a personal computer. Not only is twin- image suppression easier but the constraints characteristic of the conventional phase-shifting digital holographic-based scheme that employs multiple exposures can be overcome. The experimental results clearly show that complex spatial frequency information about the object to be measured is not lost during numerical reconstruction and that the profile of the phase object can be exactly measured and presented.
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Ching-Yang Lin, Gu-Liang Chen, Ming-Kuei Kuo, Chi-Ching Chang, and Hong-Fai Yau "3D phase object measurement using an off-axis Fresnel hologram", Proc. SPIE 6672, Advanced Characterization Techniques for Optics, Semiconductors, and Nanotechnologies III, 66720U (10 September 2007); doi: 10.1117/12.733427; https://doi.org/10.1117/12.733427
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