基于AOTF型红外光谱仪的快速探测方法研究  

Research on Fast Detection Method Based on AOTF Infrared Spectrometer

作　　者：吴钰[1,2] 陈小文[1,2] 秦侠格 

机构地区：[1]中国科学院上海技术物理研究所,上海200083 [2]中国科学院空间主动光电技术重点实验室,上海200083

出　　处：《红外》2016年第6期6-12,共7页Infrared

摘　　要：目前,声光可调谐滤光片（Acousto-Optic Tunable Filter,AOTF）型红外光谱仪已经受到了人们的广泛关注。光谱曲线的获取速度既取决于光谱采样点的数量,又取决于光谱采样的速度。介绍了一种基于精密低噪声积分放大电路的电路设计方法。与传统的锁相电路相比,该电路的采样速度较快,理论上可达到μs量级。根据上述理论,在同一信号强度、不同积分时间下进行了数据采集,然后在不同信号强度、固定积分时间下进行了数据采集。实验结果表明,该电路的采样速度可达到10-2μs量级。At present,Acousto-Optic Tunable Filter（AOTF） infrared spectrometers have attracted more and more attention.The speed of obtaining spectral curves not only depends on the number of spectral sampling points,but also depends on the rate of spectral sampling.A circuit design method based on a precision low noise integral amplifying circuit is presented.Compared with the traditional lock-in circuit,this circuit has a higher sampling speed which is up to microsecond order of magnitude in theory.According to the above theory,the data are collected with the same signal intensity and different integral time first.Then,the data are collected with different signal intensity and fixed integral time.The experimental results show that the circuit has its sampling speed up to 102 us magnitude.

关 键 词：AOTF型红外光谱仪 采样速度 信噪比 精密低噪声 

分 类 号：TH744.1[机械工程—光学工程]