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
殷亮 1邢志明 1朱科 1苗玉 1姜萌 2单新治 3高秀敏1
作者信息
- 1. 上海理工大学 光电信息与计算机工程学院,上海 200093
- 2. 北京航天控制仪器研究所,北京 100080
- 3. 上海理工大学 光电信息与计算机工程学院,上海 200093;上海理工大学 健康科学与工程学院,上海 100080
- 折叠
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3 464 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.
Abstract
To enhance the detection of alkane gas concentrations across a broad spectrum,this study intro-duces 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 3 464 nm mid-infrared light source in conjunction with the Cassegrain system,an optical system for alkane concentra-tion 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 fo-cusing at varying distances.To address issues arising from the system's large aperture,a co-axial transmis-sion and reception strategy,reducing disparity were implemented.The system can accurately measure tar-gets within the 25-100 m range.Both primary and secondary mirrors were coated with a mid-infrared en-hanced 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 conve-nience,rapid measurement,and enhanced field safety.It ensures the optical system's stability and opera-tional safety.
关键词
遥测遥感/烷烃浓度测量/中红外光/卡塞格林系统Key words
telemetry and remote sensing/alkane concentration measurement/mid-infrared light/Cassegrain system引用本文复制引用
基金项目
国家自然科学基金资助项目(62305222)
国家自然科学基金资助项目(62022059)
国家自然科学基金资助项目(62375183)
出版年
2024
国家科技期刊平台
NSTL
万方数据