基于中红外波段的烷烃浓度遥测光学系统  

Remote optical system for measuring alkane concentration based on mid-infrared band

作　　者：殷亮[1] 邢志明 朱科 苗玉[1] 姜萌[3] 单新治 高秀敏[1] YIN Liang;XING Zhiming;ZHU Ke;MIAO Yu;JIANG Meng;SHAN Xinzhi;GAO Xiumin(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Health Science and Engineering,University of Shanghai for Science and Technology Shanglai 200082,China;China Academy of Aerospace Electronics Technology,Beijing 100080,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093 [2]上海理工大学健康科学与工程学院,上海100080 [3]北京航天控制仪器研究所,北京100080

出　　处：《光学精密工程》2024年第7期966-975,共10页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.62305222,No.62022059,No.62375183)。

摘　　要：为了实现对烷烃气体浓度的大范围灵活检测,提出一种基于卡塞格林系统的中红外遥测遥感的方法。对该光学系统的发射模块、接收模块和探测模块进行整体设计研究,基于卡塞格林系统结合3464 nm的中红外光源完成对烷烃浓度遥测遥感光学系统的设计。该光学系统需要实现对25~100 m大范围内目标的测量,设计了25 cm口径的光学遥测系统。针对卡塞格林系统存在光信号丢失的问题,采用透射式非球面准直结构,可以实现对不同距离目标的调焦;针对口径过大引起的视差问题,采用发射接收同轴的方式来消除较大的视差。实验结果表明,本系统能够对25~100 m的目标进行测量。主镜和次镜镀有中红外增强金膜,使系统的稳定性得到了显著提升。经过测试,系统的总体发射效率为86%,接收效率为75.8%。烷烃遥测遥感系统能够在大范围远距离上遥测气体浓度,使用方便、测量迅速,测量人员面对的风险低,能够保证整体光学系统的稳定性及作业检测的安全性。To enhance the detection of alkane gas concentrations across a broad spectrum,this study introduces a mid-infrared telemetry and remote sensing approach utilizing the Cassegrain system.The design of the optical system's transmitting,receiving,and detecting modules was explored.Utilizing a 3464 nm mid-infrared light source in conjunction with the Cassegrain system,an optical system for alkane concentration telemetry and remote sensing was developed.To accommodate target measurements within a 25-100 m range,an optical telemetry system was crafted with a 25 cm diameter.To counteract optical signal loss in the Cassegrain system,a transmission aspheric collimation structure was employed,enabling target focusing at varying distances.To address issues arising from the system's large aperture,a co-axial transmission and reception strategy,reducing disparity were implemented.The system can accurately measure targets within the 25-100 m range.Both primary and secondary mirrors were coated with a mid-infrared enhanced gold film,significantly boosting system stability.Testing reveals the system's overall transmission efficiency at 86%,with a reception efficiency of 75.8%.This alkane telemetry and remote sensing system facilitates remote gas concentration measurement over extensive ranges and distances,offering convenience,rapid measurement,and enhanced field safety.It ensures the optical system's stability and operational safety.

关 键 词：遥测遥感 烷烃浓度测量 中红外光 卡塞格林系统 

分 类 号：TN215[电子电信—物理电子学]