Holographic approach to 3D television
Holographic approach to 3D television
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3D 电视的全息方法
DOI：
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发表时间：
2011
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通讯作者：
T. Kreis
中科院分区：
文献类型：
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作者：
T. Kreis
本文概述了三维电视的几种实现方法：立体电视、自立体电视、整体成像、体积显示和数字全息，其中记录或计算的数字全息图被送入空间光调制器（SLM）。所有方法都有其特定的优缺点，可能是视差减小，缺乏运动视差，侧向分辨率有限，遮挡问题，或严重的调节冲突，引起眼睛疲劳等不适。从原理上讲，全息技术没有这些缺陷，但必要的高空间带宽产品的问题是目前将其引入3D电视的主要障碍。所需的高空间带宽产品要求ccd和slm具有更高的像素数、更短的像素间距和比目前可用的更快的计算机。在这里，我们提出了空间带宽积问题的第一个解决方案，例如，仅限制水平视差，通过使用眼动仪导致仅计算观察到的全息图的一小部分，通过使用像平面全息术而不是菲涅耳或弗劳恩霍夫全息术，或者通过使用电和光寻址slm的适当组合。
The paper gives an overview on 3D television which can be realized by a number of methods: stereoscopy, autostereoscopy, integral imaging, volumetric display, and digital holography where digital holograms - recorded or computed - are fed to spatial light modulators (SLM). All methods have their specific advantages and disadvantages, which can be reduced parallax, lacking motion parallax, limited lateral resolution, occlusion problem, or the severe accomodation conflict, causing eye fatigue and other discomforts. By principle holography exhibits none of these imperfections, but the problem of the necessary high space-bandwidth-product is the main obstacle for its introduction for 3D TV up to now. The needed high space-bandwidth-product requires CCDs and SLMs with higher number of pixels, a shorter pixel pitch, and faster computers than available today. Here we present first solutions to the space-bandwidth-product problem, e. g. by restricting on horizontal parallax only, by using eye-trackers resulting in calculation of only the observed small parts of the hologram, by employing image plane holography instead of Fresnel- or Fraunhofer-holography, or by using a proper combination of electrically together with optically addressable SLMs.