5 June 2014 Speckle suppression in computational hologram generated using ray-sampling plane
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Speckle reduction in 3D displays by computational holography is investigated. As the important advantage of holographic 3D display is the capability of high-resolution display of deep 3D scene, the resolution of the image after applying speckle suppression is primarily discussed. Then we present a method for speckle reduction in electronic holographic display based on the recently proposed approach that utilizes time-multiplexing of holograms with sparse object points. The method is adapted to the technique for hologram calculation using ray-sampling plane. It becomes possible to apply speckle suppression to the holographic display of deep 3D scene. It was shown that smaller number of frames for time-multiplexing effectively reduces the speckle noise through the computer simulation. Additionally, angular-multiplexing technique is presented to reduce the number of frames for time-multiplexing, and the experimental results show the effectiveness of the proposed speckle suppression.
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Masahiro Yamaguchi, Masahiro Yamaguchi, Takeru Utsugi, Takeru Utsugi, "Speckle suppression in computational hologram generated using ray-sampling plane ", Proc. SPIE 9117, Three-Dimensional Imaging, Visualization, and Display 2014, 91170A (5 June 2014); doi: 10.1117/12.2054762; https://doi.org/10.1117/12.2054762

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