基于AOTF的在线红外光谱测量系统  

On-line IR spectrum measuring system based on acousto-optic tunable filter

作　　者：李小霞[1] 孙振东[1] 万峰[1] 赵玉春[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院,天津300072

出　　处：《光电工程》2002年第4期39-42,45,共5页Opto-Electronic Engineering

基　　金：国家自然科学基金(69977015)资助项目; 天津市自然科学基金项目(983606911)

摘　　要：介绍了一种新型的红外光谱测量系统,它由准直发射系统和聚焦接收系统两大部分组成,以声光可调谐滤光器(AOTF)为色散元件,连续改变AOTF的驱动频率就能实现快速波长扫描,达到实时测量目的。该系统具有结构简单、测量快速等特点,可用于在线有害气体检测和红外光谱分析。实验表明,系统光谱测量范围为2.5～5μm,光谱分辨力为10nm。A novel IR spectrum measuring system is presented. It consists of alignment-transmitting system and focusing-receiving system. With Acousto-Optic Tunable Filter (AOTF) as dispersive element, a quick wavelength scanning can be realized through continuously varying the driving frequency of AOTF and real-time measurement can be attained. The system has the advantages of simple structure and quick measurement. It can be applied to on-line detection of the harmful gas and IR spectrum analysis. The experiments show that its measuring range is 2.5~5-micrometer and spectral resolution is 10 nm.

关 键 词：在线红外光谱测量系统 声光可调谐滤光器 AOTF 声光互作用 分光光度 

分 类 号：TH744.1[机械工程—光学工程]