空间光调制器曲面拼接实现全息三维显示视角拓展

曾震湘; 郑华东; 卢小仟; 高洪跃; 于瀛洁

doi:10.3788/CO.20150802.0227

空间光调制器曲面拼接实现全息三维显示视角拓展

doi: 10.3788/CO.20150802.0227

上海大学精密机械工程系应用光学与检测实验室，上海 200072

基金项目: 国家自然科学基金资助项目(No.61235002,No.61101176,No.11474194),上海市高等院校青年教师培养资助项目(No.ZZSD12014),上海市教委创新团队资助项目

详细信息

通讯作者:
曾震湘(1988—)，男，湖南益阳人，博士研究生，主要从事全息三维显示方面的研究。E-mail:zengzhenxiang1019@126.com

中图分类号: O438.1
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出版历程
- 收稿日期: 2014-12-11
- 录用日期: 2015-02-13
- 刊出日期: 2015-04-25

Viewing angle enlargement in holographic 3D display by spatial light modulators tiling in curved configuration

Laboratory of Applied Optics and Metrology,Department of Precision Mechanical Engineering,Shanghai University,Shanghai 200072,China

摘要

摘要: 本文对多空间光调制器不同拼接方式拓展全息三维再现像视角的方法进行了分析,基于多片空间光调制器拼接拓展视角的思想,利用平面反射镜、分光镜和两片透射式空间光调制器设计了曲面拼接系统,进行了全息三维再现像的视角拓展实验研究。用该系统对四棱锥物体的层析菲涅尔衍射全息图进行再现,结果表明,总视角由基于单片空间光调制器的1.7°增大到3.2°,即拓展到约1.9倍,分光镜能够消除两片空间光调制器间的间隙,实现无缝拼接。该方法同样适用于更多空间光调制器的曲面拼接中,可以有效地拓展全息再现像的视场角大小。
- 全息显示 /
- 空间光调制器 /
- 曲面拼接 /
- 视角拓展
Abstract: In this paper, we analyzed the principles of tiling SLMs to enlarge the viewing angle of holographic 3D reconstructions. Based on the idea of tiling multi-SLMs, we designed a holographic 3D display system using planar mirrors, beam splitters and two transmission-type SLMs tiled in curved configuration to enlarge the viewing angle of reconstructed image. We calculated computer-generated holograms of a pyramid using slice-based Fresnel diffraction algorithm, and reconstructed it with self-setup holographic display system. The results indicate that, in contrast to 1.7° of viewing angle obtained by a single SLM, the viewing angle of holographic reconstructed images is enlarged to 3.2° with 2 tiling transmission-type SLMs by about 1.9 times. The beam splitter can remove the gap of two SLMs' active areas to realize seamless tiling. This method is also applicable to tile more SLMs in curved configuration and can effectively enlarge the viewing angle of holographic display.
- holographic display /
- spatial light modulators /
- tiling in curve configuration /
- viewing angle enlargement

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图 1 单个SLM再现时的视角大小

Figure 1. Viewing angle of single SLM

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图 2 多SLMs的拼接方式

Figure 2. Tiling of multiple SLMs

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图 3 2片SLMs曲面拼接光路原理图

Figure 3. Schematic of tiling 2 SLMs in curved configuration

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图 4 视角测量实验

Figure 4. Viewing angle measurement

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图 5 利用2片透射式SLM曲面拼接的全息三维显示系统

Figure 5. 3D Holographic display system with 2 transmissive SLMs tiling in curved configuration

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图 6 相机在不同视点拍摄到的四棱锥再现像

Figure 6. Reconstructed pyramids captured from different viewpoints by camera

下载: 全尺寸图片幻灯片

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