| 彩色全息显示中液晶空间光调制器位相调制偏差的矫正方法 |
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| 引用本文： | 郑华东,于瀛洁,代林茂,王涛.彩色全息显示中液晶空间光调制器位相调制偏差的矫正方法[J].海洋学报,2010,32(9):6145-6151. |
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| 作者姓名： | 郑华东 于瀛洁 代林茂 王涛 |
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| 作者单位： | 上海大学精密机械工程系,上海 200072;上海大学精密机械工程系,上海 200072;上海大学精密机械工程系,上海 200072;上海大学精密机械工程系,上海 200072 |
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| 基金项目： | 国家自然科学基金(批准号:60772124),上海市科委国际合作项目(批准号:09530708700)和上海大学研究生创新基金(批准号:Shucx101060,Shucx102195)资助的课题. |
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| 摘 要： | 采用三基色激光照明并结合时分复用或空间复用技术,可实现基于液晶空间光调制器(LC-SLM)的彩色全息显示. 但由于在不同激光波长入射条件下LC-SLM的位相调制特性曲线不同,难以同时满足多波长入射条件下2π线性位相调制的要求,致使彩色全息再现结果受到共轭像和零级斑的干扰. 针对该问题,本文通过实验测试获得LC-SLM在不同波长入射时的位相调制特性曲线,并分析了RGB激光器各分量的位相调制特性曲线非线性偏差和调制幅度偏差对多阶位相型傅里叶变换相息图再现效果的影响. 根据"查表法"建立了各波长入射条件下满足2
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| 关 键 词： | 彩色全息显示 液晶空间光调制器 位相调制 偏差矫正 |
Correction method for phase-modulation deviation of liquid crystal spatial light modulator in full-color holographic display |
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| Zheng Hua-Dong,Yu Ying-Jie,Dai Lin-Mao and Wang Tao.Correction method for phase-modulation deviation of liquid crystal spatial light modulator in full-color holographic display[J].Acta Oceanologica Sinica (in Chinese),2010,32(9):6145-6151. |
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| Authors: | Zheng Hua-Dong Yu Ying-Jie Dai Lin-Mao and Wang Tao |
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| Institution: | Department of Precision Mechanical Engineering, Shanghai University, Shanghai 200072, China;Department of Precision Mechanical Engineering, Shanghai University, Shanghai 200072, China;Department of Precision Mechanical Engineering, Shanghai University, Shanghai 200072, China;Department of Precision Mechanical Engineering, Shanghai University, Shanghai 200072, China |
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| Abstract: | It is feasible to realize full-color holographic display based on liquid crystal spatial light modulator by use of multi-wavelength illumination combined with time division multiplexing (TDM) or space division multiplexing (SDM). However, the modulation characteristics of liquid crystal spatial light modulator (LC-SLM) vary with the wavelength of incident laser beam. Especially, the non-linearity and the modulation-depth mismatch of phase modulation curve are the important factors influencing the reconstruction quality of phase hologram in full-color holographic display. In order to solve this problem, a novel method is proposed to correct the gray-scale of phase holograms in the RGB channels with the established gray-mapping model according to the phase modulation curves measured under different wavelengths, and compensate the effects of non-linearity and the modulation-depth mismatch of phase modulation curves. Analysis of numerical and optical reconstruction results are carried out. It is verified that the method is effective to improve the qualities of reconstructed images in the RGB channels. |
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| Keywords: | full-color holographic display liquid crystal spatial light modulator (LC-SLM) phase modulation deviation correction |
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