Tri-color composite volume H-PDLC grating and its application to 3D color autostereoscopic display.
Tri-color composite volume H-PDLC grating and its application to 3D color autostereoscopic display.
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DOI：
10.1364/oe.23.031436
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发表时间：
2015-11
期刊：
影响因子：
3.8
通讯作者：
Kangni Wang;Jihong Zheng;Hui Gao;F. Lu;Lijia Sun;S. Yin;S. Zhuang
中科院分区：
文献类型：
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作者：
Kangni Wang;Jihong Zheng;Hui Gao;F. Lu;Lijia Sun;S. Yin;S. Zhuang
报道了一种三色复合体全息聚合物分散液晶（H-PDLC）光栅及其在三维彩色自立体显示中的应用。复合体积H-PDLC光栅由三个不同周期的体积H-PDLC子光栅组成。较长周期衍射红光，中等周期衍射绿光，较短周期衍射蓝光。为了同时记录三个不同周期的光栅，使用了两个光引发器。第一引发剂由亚甲基蓝和对甲苯磺酸组成，第二引发剂由孟加拉玫瑰和n -苯甘氨酸组成。在这种情况下，全息记录介质对包括红色、绿色和蓝色在内的整个可见波长都很敏感，因此三色复合光栅可以通过利用三种不同颜色的激光束同时写入。实验中，红色光束来自输出波长为632.8 nm的He-Ne激光器，绿色光束来自输出波长为532 nm的威尔第固态激光器，蓝色光束来自输出波长为441.6 nm的He-Cd激光器。实验结果表明，红、绿、蓝三种颜色对应的衍射效率分别为57%、75%和33%。虽然这种衍射效率并不完美，但足以证明三维彩色自立体显示的效果。
A tri-color composite volume holographic polymer dispersed liquid crystal (H-PDLC) grating and its application to 3-dimensional (3D) color autostereoscopic display are reported in this paper. The composite volume H-PDLC grating consists of three different period volume H-PDLC sub-gratings. The longer period diffracts red light, the medium period diffracts the green light, and the shorter period diffracts the blue light. To record three different period gratings simultaneously, two photoinitiators are employed. The first initiator consists of methylene blue and p-toluenesulfonic acid and the second initiator is composed of Rose Bengal and N-phenyglycine. In this case, the holographic recording medium is sensitive to entire visible wavelengths, including red, green, and blue so that the tri-color composite grating can be written simultaneously by harnessing three different color laser beams. In the experiment, the red beam comes from a He-Ne laser with an output wavelength of 632.8 nm, the green beam comes from a Verdi solid state laser with an output wavelength of 532 nm, and the blue beam comes from a He-Cd laser with an output wavelength of 441.6 nm. The experimental results show that diffraction efficiencies corresponding to red, green, and blue colors are 57%, 75% and 33%, respectively. Although this diffraction efficiency is not perfect, it is high enough to demonstrate the effect of 3D color autostereoscopic display.