Single-exposure digital holographic reconstruction with Bicubic interpolation-extrapolation

Zhengzhong Huang; Liangcai Cao

doi:10.1117/12.2573498

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10 October 2020 Single-exposure digital holographic reconstruction with Bicubic interpolation-extrapolation

Zhengzhong Huang, Liangcai Cao

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Proceedings Volume 11551, Holography, Diffractive Optics, and Applications X; 115511G (2020) https://doi.org/10.1117/12.2573498
Event: SPIE/COS Photonics Asia, 2020, Online Only

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Abstract

Digital holography enables the digitization processing of holograms. The resolution of the reconstructed image is greatly limited by the pixelated imaging detectors. This work investigates the effect of the initial hologram size on the imaging point spread function and introduces a bicubic interpolation and extrapolation iterative (BIPEPI) method. It circumvented the recording limitation in a certain extent to obtain more wave field information beyond the experimental recording area. The bicubic interpolation (BIP) method increases the pixel density inside the hologram to enhance the low-frequency terms of the object. With extrapolation iterative (EPI) method, more high order fringes around the experimental hologram are generated to enhance the high-frequency terms of the object. This method can improve the point spread function of small size detector to effectively increase the reconstructed resolution.

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Zhengzhong Huang and Liangcai Cao "Single-exposure digital holographic reconstruction with Bicubic interpolation-extrapolation", Proc. SPIE 11551, Holography, Diffractive Optics, and Applications X, 115511G (10 October 2020); https://doi.org/10.1117/12.2573498

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