采用TracePro进行中红外气体检测系统的光路结构设计

大多数气体分子在3～5 μm的中红外区都有基本振动吸收谱带,采用中红外半导体光电子器件进行气体浓度的检测,具有灵敏度高、准确性好,稳定、可靠等优点.TracePro软件是一套普遍用于杂散光分析、照明系统分析以及光学系统分析的光线设计和仿真软件.采用TracePro软件设计了一个用于中红外气体检测系统的反射式双光程结构,并采用TracePro软件对光学设计进行了仿真与分析.通过TracePro的分析检查出设计中存在的缺陷与不足,对设计进行调整与修改,得到最优化的光学结构.

Design of the optical structure of the mid-infrared gas sensing system by using the TracePro

Most gas molecules have the fundamental vibration absorb spectrum in the mid-infrared region during 3 ～ 5 μm. Detecting the gas concentration using the mid-infrared semiconductor opto-electronic devices have more advantages, such as high sensitivity, high accuracy and stability etc. The optical software TracePro is a simulation and analysis tool that performs stray light analysis,illumination analysis,and optical systems analysis. This paper designs a dual path structure using TracePro for mid-infrared gas sensing system. Using TracePro to simulate and analyze this optical design and modify the design according the analysis report.