一种长波红外宽光谱长波通滤光片的优化设计

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  一种长波红外宽光谱长波通滤光片的优化设计Optimization Design of An Infrared Broad-band Long.wave Pass Filter 在线阅读 下载全文 收藏本页 导出题录 分享
作　　者：张佰森 陈焘 熊玉卿 ZHANG Bai-sen, CHEN Tao, XIONG Yu-qing （National Key Laboratory of Science and Technology on Surface Engineering, Lanzhou Institute of Physics, Lanzhou 730000, China） 机构地区：兰州物理研究所表面工程技术国家级重点实验室,甘肃兰州730000 出　　处：《沈阳师范大学学报：自然科学版》 CAS 2010年第1期 27-29页,共3页 《Journal of Shenyang Normal University： Nat Sci Ed》 基　　金：表面工程技术国家级重点实验室基金项目（9140C540109100C54）. 摘　　要：长波红外宽光谱长波通滤光片是光谱成像技术中重要的光学元件。论述了设计长波红外宽光谱长波通滤光片的设计原则和方法，并对这种长波红外宽光谱长波通滤光片优化设计进行了研究。根据等效折射率理论，以周期性对称膜系为基础，使用压缩透射区内波纹幅度的部分膜层优化方法，设计了满足性能指标要求的长波红外长波通滤光片。经过优化，所设计的长波红外宽光谱长波通滤光片，高透射波段内平均透射率大于90％，最低透射率高于85％；截止波段内平均透射率小于1％，最高透射率低于5％。研究表明，用部分膜层优化方法设计的膜系，膜层结构简单，有利于膜层厚度的监控，既能克服全自动优化方法给工艺上带来的困难，又弥补了解析法设计膜系时不能调整光谱特性的不足。 Infrared broad-band long-wave pass filter is a key element for imaging spectrum technique. In this paper, we discussed the design principles and method of the filter, and optimization design of the filter was also investigated. In order to reduce the transmittance band ripple of film system, we used the equivalent-index method to design the filter and to optimize the thickness of some chosen films. The film system spectrum has a relatively flat ripple and high transmittance in transmittance band. Its average transmittance ratio is more than 90%, and the minimum transmittance ratio exceeds 85 % in the pass band. The average transmittance ratio is less than 1%, and the maximum transmittance ratio under 5 % in the rejection band. The result shows that make use of the method of optimizing some chosen films, the film system is simplified and it is convenient to monitor the film thickness. 关 键 词：红外 长波通滤光片 薄膜设计 优化

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