内调制微光探测系统  

Low Iuminous Intensity Detecting System by Using Intramodulated Photodetector

作　　者：黄启俊[1] 郭锦鹏[1] 李学文[1] 何民才[1] 戴锋[1] 

机构地区：[1]武汉大学应用物理系,武汉430072

出　　处：《传感技术学报》2002年第2期124-127,共4页Chinese Journal of Sensors and Actuators

基　　金：国家九五重点科技攻关项目 :96 -12 0 -2 9-01

摘　　要：本文介绍了一种使用新型内调制光敏管作为探测单元的、高精度的微光探测系统 ,利用单片机对系统的模拟信号进行数据采集、校正和补偿 ,极大地必将善了内调制微光探测系统的非线性和温度漂移特性 .经测试该系统可探测到 6 .5× 10 -6Lx的微光 ,在峰值波长 870nm处最小探测功率约为 2× 10 -13 W .A high-precise system for low luminous intensity has been introduced in this paper, the detecting unit of which is a new photodetector called intramodulated photosensor. The system specific characteristics of nonlinearity and temperature are improved by using Single-chip-microcomputer to gather, calibrate and compensate the analog signal. The measurement shows that this system can detect the lowest illuminance of 6.5×10 -6 lx and the lowest irradiancy of 2×10 -13 W at the peak wavelength of 870 nm.

关 键 词：内调制 单片机 非线性补偿 

分 类 号：TN364[电子电信—物理电子学] TP368.1[自动化与计算机技术—计算机系统结构]