红外线阵探测器筛选电路的设计与研究
2014-10-21李闻先刘栋斌李哲
李闻先 刘栋斌 李哲
【摘要】为保证航天任务中短波红外线阵探测(SWIR)的可靠性与稳定性,本文针对Xenics公司的商用短波红外线阵探测器,设计了可同时进行10片探测器老炼的筛选测试系统电路。采用老炼前测试参数,老练过程中记录感光数据及老练后参数测试比对的方法筛选剔除出不合格器件。通过演示样机在暗室环境下对积分球亮度的调节进行探测器的感光参数测试,试验结果表明,器件完全满足可靠性筛选方法的要求。本文中筛选电路的设计方法对其他航天任务中的低等级器件筛选也具有一定的参考价值。
【关键词】红外线阵探测器;老炼筛选;成像系统
Design and Research of Screening Circuit for Short Wavelength Infrared Linear Detector
Li Wenxian,Liu Dongbin,Li Zhe
(Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun,Jilin 130033,China)
Abstract:In order to make ensure the reliability and stability of short wave infrared detector in space mission,in this paper a test system which can screen 10 devices manufactured by Xenics simultaneously was designed.To find out unqualified devices,three steps are carried out, consisting of parameters test before burn-in process,photosensitive property test during the burn-in process and parameters test after burn-in process.The parameters test are carried out by adjusting the brightness of integrating sphere in darkroom,and the shows the devices meet the requirements of reliability screening method.The design of screening circuit has a certain value for screening other low-level devices in other space missions.
Key word:Infrared Linear Array Detector;Ageing and Screening;Imaging System
1.引言
InGaAs探測器的截止波长可在0.8~3.5μm围内变化,在常温下便可工作,且探测性能优良,短波红外传感器在空间对地探测,如了解资源分布、土壤水分监测、大气成分分析、农作物估产等方面有着重要的作用,可以在很大程度上满足空间遥感仪器在短波红外范围内的探测应用需求[1,2]。然而航天任务对电子元器件的质量等级要求很高,器件的温度特性、真空特性、抗辐照特性等均要满足系统要求,然而由于元器件的采购渠道、采购周期、经费限制等因素,通常会采用低等级器件来代替高等级器件,为满足航天环境下的应用要求,需对低等级器件进行可靠性筛选,剔除有缺陷或潜在缺陷的器件。Xenics公司的商业级线阵短波红外探测器在低光照条件下具有高敏感度、高量子效率、宽动态范围、高的数据传输率、以及低噪声等优点,故适合用于在空间光电探测领域。……
