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High-quality three-dimensional holographic display with use of multiple fractional Fourier transform 被引量:2

High-quality three-dimensional holographic display with use of multiple fractional Fourier transform
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摘要 In order to realize holographic display of three-dimensional (3D) objects and suppress zero-order light, conjugate image, and speckle noise, a novel method is proposed based on multiple fractional Fourier transform (M-FrFT) for cMculating holograms of 3D objects. A series of kinoforms are generated by adding pseudorandom phase factor (PPF) to object planes in calculating each kinoform, and generating the PPF randomly again in the next kinoform calculation. The reconstructed images from kinoform sequence are superposed together in order to suppress the speckle noise of reconstructed image and improve the contrast and detail resolution of the reconstructed images. The qualities of reconstructed images from single amplitude hologram, single kinoform, and kinoform sequence calculated by M-FrFT are compared. The effects of suppressing speckle noise are analyzed by calculating the speckle index of numerical reconstructed images. The analytical results illustrate that, with the proposed method for 3D holographic display, the zero-order light, conjugate image, and speckle noise can be suppressed, and the qualities of reconstructed images can be improved significantly. In order to realize holographic display of three-dimensional (3D) objects and suppress zero-order light, conjugate image, and speckle noise, a novel method is proposed based on multiple fractional Fourier transform (M-FrFT) for cMculating holograms of 3D objects. A series of kinoforms are generated by adding pseudorandom phase factor (PPF) to object planes in calculating each kinoform, and generating the PPF randomly again in the next kinoform calculation. The reconstructed images from kinoform sequence are superposed together in order to suppress the speckle noise of reconstructed image and improve the contrast and detail resolution of the reconstructed images. The qualities of reconstructed images from single amplitude hologram, single kinoform, and kinoform sequence calculated by M-FrFT are compared. The effects of suppressing speckle noise are analyzed by calculating the speckle index of numerical reconstructed images. The analytical results illustrate that, with the proposed method for 3D holographic display, the zero-order light, conjugate image, and speckle noise can be suppressed, and the qualities of reconstructed images can be improved significantly.
出处 《Chinese Optics Letters》 SCIE EI CAS CSCD 2009年第12期1151-1154,共4页 中国光学快报(英文版)
基金 supported by the National Natural Science Foundation of China (No. 60772124) the Shanghai University Innovation Funds for Graduates(No. Shucx080215) the Post-doctoral Fund by Scienceand Technology Commission of Shanghai Municipality(No. 09R21412900) the International Cooperation Project of Science and Technology Commission of Shang-hai Municipality (No. 09530708700)
关键词 Fourier transforms HOLOGRAMS Holographic displays SPECKLE Fourier transforms   Holograms   Holographic displays   Speckle
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