24 November 2009 Generation and optoelectronic reconstruction of binary CGH based on detour phase encoding
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Abstract
A binary amplitude Fourier computer-generated hologram is produced, from which both numerical and optoelectronic reconstruction can be implemented. The hologram is formed on the computer screen based on improved detour phase encoding, and saved as a digital image at suitable resolution without printing and photographical reduction. Numerical reconstruction can be obtained directly from inverse Fourier transform of the hologram, resulting in only the original and conjugate images. Optoelectronic reconstruction can be realized by using an electronic addressing reflective liquid-crystal display (LCD) spatial light modulator. A binary digital hologram from the computer is loaded on a LCD panel. A clear image can be observed in the distance by illuminating a reference light from a laser source to the liquid-crystal panel. The digitally stored hologram can be used for dynamic electro-holographic display, unlike the existing methods based on detour phase encoding which can reconstruct hologram either numerically or optically. The proposed method significantly reduces noise in the reconstructed images. Experimental results show effectiveness of the method.
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Su-juan Huang, Xiao-jing Liu, Shuo-zhong Wang, Xing Jiang, "Generation and optoelectronic reconstruction of binary CGH based on detour phase encoding", Proc. SPIE 7513, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Imaging and Process Technology, 75131D (24 November 2009); doi: 10.1117/12.837732; https://doi.org/10.1117/12.837732
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