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不同结构长波红外探测器组件的MTF分析

MTF of infrared detector modules with different structures

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摘要

红外探测器组件作为目标探测和成像系统的核心器件,其空间分辨能力直接影响着探测系统的成像质量.评估探测器组件空间分辨能力时,常使用调制传递函数(MTF),而不同的探测器组件结构与其 MTF直接相关.介绍了一套弥散斑直径为30 μm的红外小光点测试系统,采用扫描狭缝法测试不同结构红外探测器组件的MTF.测试结果表明叠层电极结构侧面存在的光响应会导致线扩散函数(LSF)展宽和次峰等现象,从而造成探测器组件MTF下降,同时0.17 mm和0.30 mm两种芯片和滤光片间距对于探测器组件MTF的影响甚微,该结果为红外探测器组件杂光抑制设计提供了参考.

Abstract

The infrared detector module is the key device of target detection and imaging system. Its spatial resolution directly affects imaging quality of detection system. When evaluating the spatial resolution of detector modules, researchers usually adopt modulation transfer function (MTF), which is influenced by the different structures of the detector modules. The basic principle and configuration of infrared micron-spot test system with an optical dispersion diameter of 30 μm was introduced. MTF of detectors with different structures was measured by scanning slit technique. The results show that the profile of overlap electric region is photosensitive. This is the main factor to widen the line spread functions(LSF), cause the secondary peak, and so on. The MTF is thus deteriorated. Meanwhile, the different distance of chip and filter with 0.17 mm and 0.30 mm influences slightly the optical crosstalk of the detector module. These results are used for optimizing design of infrared detector modules for stray light control.

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中图分类号:TN06

DOI:10.11972/j.issn.1001-9014.2016.03.008

基金项目:国家自然科学基金(61376052)

收稿日期:2015-05-16

修改稿日期:2015-12-13

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作者单位    点击查看

汪洋:中国科学院上海技术物理所 传感技术国家重点实验室,红外成像材料与器件重点实验室,上海200083
刘大福:中国科学院上海技术物理所 传感技术国家重点实验室,红外成像材料与器件重点实验室,上海200083
徐勤飞:中国科学院上海技术物理所 传感技术国家重点实验室,红外成像材料与器件重点实验室,上海200083
王妮丽:中国科学院上海技术物理所 传感技术国家重点实验室,红外成像材料与器件重点实验室,上海200083
李雪:中国科学院上海技术物理所 传感技术国家重点实验室,红外成像材料与器件重点实验室,上海200083
龚海梅:中国科学院上海技术物理所 传感技术国家重点实验室,红外成像材料与器件重点实验室,上海200083

联系人作者:汪洋(wangyang@mail.sitp.ac.cn)

备注:汪洋(1981-),男,浙江富阳人,副研究员,在职博士生,主要研究领域为红外探测器组件测试技术研究.

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引用该论文

WANG Yang,LIU Da-Fu,XU Qing-Fei,WANG Ni-Li,LI Xue,GONG Hai-Mei. MTF of infrared detector modules with different structures[J]. Journal of Infrared and Millimeter Waves, 2016, 35(3): 294-299

汪洋,刘大福,徐勤飞,王妮丽,李雪,龚海梅. 不同结构长波红外探测器组件的MTF分析[J]. 红外与毫米波学报, 2016, 35(3): 294-299

被引情况

【1】陈博洋,吴琼,冯绚,郭强,魏彩英. FY-4A多通道扫描辐射成像仪评价与图像合成. 红外与毫米波学报, 2018, 37(4): 411-415

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