320×256长波红外探测器低噪声采集系统设计  

Design of the Acquisition System with Low Noise Based on 320×256 Long Wavelength Infrared Detector

作　　者：谢宝蓉[1] 傅雨田[1] 张滢清 

机构地区：[1]中国科学院上海技术物理研究所,上海200083 [2]上海太阳能工程技术研究中心有限公司,上海200241

出　　处：《红外技术》2010年第4期191-194,203,共5页Infrared Technology

基　　金：福建省青年科技人才创新项目;项目编号:2007F3066

摘　　要：针对320×256长波红外焦平面探测器工作原理和输出信号特点,从低噪声角度出发,设计了长波红外探测器采集系统,着重解决了如何在满足驱动能力条件下降低噪声问题。对提供精密偏置电压和输出信号处理过程给出了详细的设计思路和实现方法。实验结果表明,系统获得了较好的噪声特性,在300 K和310K黑体照射下、探测器积分80μs且远未饱和情况下,平均噪声等效温差为80 mK。According to the working principle and characteristics of 320×256 long wavelength infrared detector, the paper gives a description of signal processing design procedure on the principle of low noise. It focuses on the problem how to reduce noise under the circumstance of guarantee ability of drive load. A detailed design idea is provided on how to offer precise DC offset voltage and the output signal processing. The experiment result demonstrates that system works well and has a comparably good noise characteristic. The average NETD of the system is 80 mK under the radiation of 310 K dark body with 80μs integration time of detector which is far unsaturated.

关 键 词：320×256 长波红外 低噪声 噪声等效温差 

分 类 号：TN215[电子电信—物理电子学]