文献类型：期刊文献

中文题名：色散对液晶菲涅耳透镜衍射效率的影响研究

英文题名：Influence of dispersion on diffraction efficiency of liquid crystal Fresnel lenses

作者：孙会娟[1,2];高兴茹[2];姚淑娜[2];周庆莉[3];曹召良[4]

第一作者：孙会娟

通讯作者：Cao, Z.-L.

机构：[1]北京理工大学光电学院;[2]北京联合大学基础部;[3]首都师范大学物理系;[4]中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室

第一机构：北京理工大学光电学院,北京100081

通讯机构：[4]State Key Lab. of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

年份：2012

卷号：23

期号：11

起止页码：2229-2236

中文期刊名：光电子．激光

外文期刊名：Guangdianzi Jiguang/Journal of Optoelectronics Laser

收录：EI(收录号：20125015786957);Scopus(收录号：2-s2.0-84870580097);北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：国家自然基金重点项目(10904110;11174274);北京市教委(KM200910028006)资助项目

语种：中文

中文关键词：液晶菲涅耳透镜;衍射效率;色散

外文关键词：liquid crystal Fresnel lens； diffraction efficiency； dispersion

摘要：首先研究了液晶菲涅耳透镜和传统菲涅耳透镜的区别,并给出液晶菲涅耳透镜衍射效率的计算公式。接着,研究了液晶材料的色散和入射波长偏离量化波长对衍射效率的影响。经过计算分析并通过相应的实验发现,当量化波长为470nm时,在400nm和700nm处衍射效率分别下降了9.0%和27.5%,说明波长偏离对液晶菲涅耳透镜的衍射效率影响较大;当量化波长为510nm时,波长偏离在400nm和700nm处产生的衍射效率下降大致相当,约为20.0%;当在400nm和700nm处液晶的折射率变化量Δn基本相等时,液晶色散造成的衍射效率降低都约为8.0%。结果表明,和波长偏离相比,液晶色散对衍射效率的影响相对较小,且液晶菲涅耳透镜的量化波长应在470～510nm区间选取。实验测量了色散对液晶菲聂耳透镜衍射效率的影响,测量结果和理论计算结果非常接近,说明分析结论有效。
Firstly, the difference between a liquid crystal （LC） Fresnel lens and a conventional Fresnel lens is researched and computational formulas are given to calculate the diffraction efficiency of LC Fresnel lens. Then, the effects of material dispersion and incident wavelength deviation from the quantified wavelength on the diffraction efficiency are analyzed. Because of material dispersion and the wavelength deviation from the quantified wavelength of 470 nm,at the wavelengths of 400 nm and 700 nm,the dif- fraction efficiency decreases by 9 % and 27.5%, respectively. If the quantified wavelength is 510 nm, the diffraction efficiency decrease caused by the wavelength deviation is about 20 0% for both 400 nm and 700 nrn. When the variation of An is approximately the same at the wavelengths of 400 nm and 700 nm, the decrease of diffraction efficiency caused by the dispersion is about 8 %. Therefore, compared with wave- length deviation, material dispersion has little influence on the diffraction efficiency. Furthermore, the op- timal quantified wavelength should be selected within the range of 470-510 nm. Finally, the influence of dispersion on the diffraction efficiency of LC Fresnel lens is measured. Compared with measured results, the theoretical analysis is found to be very effective.