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DESIGNING A DIFFRACTIVE OPTICAL ELEMENT FOR CONTROLLING THE BEAM PROFILE IN A THREE-DIMENSIONAL SPACE USING THE SIMULATED ANNEALING ALGORITHM 总被引:4,自引:0,他引:4
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We have designed a spatially quantized diffractive optical element (DOE) for controlling the beam profile in a three-dimensional space with the help of the simulated annealing (SA) algorithm. In this paper, we investigate the annealing schedule and the neighbourhood which are the deterministic parameters of the process that warrant the quality of the SA algorithm. The algorithm is employed to solve the discrete stochastic optimization problem of the design of a DOE. The objective function which constrains the optimization is also studied. The computed results demonstrate that the procedure of the algorithm converges stably to an optimal solution close to the global optimum with an acceptable computing time. The results meet the design requirement well and are applicable. 相似文献
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电致荧光变色是指在外加电压作用下材料的发光颜色发生变化的现象,具体表现为荧光的开/关或颜色变换的切换过程。近几年因其在离子传感器、信息显示、生物分析以及光学成像和信息存储等领域的潜在应用,受到科研工作者的广泛关注。电致荧光变色材料可以将电化学信号转变为直接可见的视觉信号,所以也被认为是最有应用前景的智能材料之一。本文阐述了近年来电致荧光变色材料的主要研究进展,专注于介绍电致荧光变色材料的分类(包括双官能团分子、荧光团和聚合物)及其变色机理,并着重讨论了它们的结构特点以及特定的应用。同时提出这类材料具有高的发光对比度、快的响应速度、长期稳定性、多色变化的优点以及在有机光电领域的应用前景,最后概述了这一研究领域的未来发展方向。 相似文献
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