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| 1 | 折反式2f系统光学相关器的研究显示文摘为进一步缩小光学相关器体积,设计了一种折反式2f系统光学相关器,光路采用折叠反射式结构,用数字微透镜取代传统相关器中的实体透镜,缩减了结构体积,提升了系统集成度。利用等效光路法对其进行理论分析,给出了折反式2f相关器的结构设计条件及结构参数。针对该相关器,设计了与之匹配的综合鉴别函数滤波器,利用自编程序进行模拟仿真分析。结果显示,当待识别目标发生缩放与旋转畸变时,该相关器仍具有较好的畸变不变识别性能。 | 杨拓 徐平 周亮 喻珺 李雄超 黄海漩 | 2018 | 光学学报2018，38，1： | 2 |
| 2 | Simulation and optimization of spatial light modulation of twisted-nematic liquid crystal display显示文摘The approaches to obtaining desired intensity or phase modulation by twisted-nematic liquid crystal display (TN-LCD) have been extensively studied based on the knowledge of the LCD’s internal structure parameters. Generally, the TN-LCD placed between two linear polarizers (P) produces coupled intensity and phase modulation. To obtain the commonly used phase-only modulation, quarter wave plates (QWPs) are often used in front of and/or behind the LCD. Here we present a method to optimize the optical modulation properties of the TN-LCD to obtain phase-only modulation in the configuration of P-QWP-LCD-QWP-P each with proper orientation. Our method is based on the macroscopical Jones matrix descriptions for the LCD, the QWPs, and the linear polarizers. Through Jones matrix calculations, the orientations of the polarizers and QWPs can be optimized to satisfy differently desired modulation demands. In contrast to the traditional method, which requires knowledge of the LCD’s internal structure parameters, our method simplified the complicated theory analysis and can work in the absence of information on the LCD’s internal structure parameters, which are usually not available for the commercial products. | 马百恒 姚保利 严绍辉 彭飞 闵俊伟 雷铭 叶彤 | 2010 | Chinese Optics Letters2010，8，10： | 0 |
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