可见-短波红外波段光谱模块光机装调及分析
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摘要
介绍了自行研制的辐射仪器的光谱模块,其光谱范围覆盖可见-短波红外波段(400nm～2 500nm),讨论了光谱模块的装调方法并对装调结果进行了分析研究。辐射仪器由3个光谱模块组成,分别是可见波段光谱模块(400nm～1 000nm),近红外波段光谱模块(900nm～1 700nm)和短波红外波段光谱模块(1 600nm～2 500nm),光谱模块的探测单元均以平场凹面光栅分光,线阵探测器探测信号,光谱模块的光机组件主要包括光纤头、狭缝、反射镜组件、光栅组件和探测器组件等。鉴于光谱模块的光机装调效果与其光机设计息息相关,装调结果的好坏能反映光机设计的优劣,针对光谱模块的光机设计特点进行了光机装调。光机装调分析结果表明:3个光谱模块的波长分辨率分别优于4nm,15nm和20nm,达到了仪器的设计指标,验证了光机设计、装调的合理性。
The spectral modules of self developed radiometer are introduced.The spectral range covers the visible-short wave infrared band(400 nm～2 500 nm).The methods of opto-mechanical assembly of spectral modules are discussed and the results of opto-mechanical assembly are analyzed.The radiometer consists of three spectral modules:the visible spectral module(400 nm～1 000 nm)(VIS for short),the near-infrared spectral module(900 nm～1 700 nm)(NIR for short),and the short wave infrared spectral module(1 600 nm～2 500 nm)(SWIR for short).The detection units of spectral module use the flat-field concave grating to diffract and focus different wavelengths,use the linear array detector to detect signals.The optical units of spectral modules consist of optical fiber,slit,assembly of reflector,assembly of grating and assembly of detector.Since the effect of opto-mechanical assembly is closely related to optomechanical design,the result of opto-mechanical assembly can reflect the advantages and disadvantages of opto-mechanical design.According to the characteristics of the opto-mechanical design of the spectral modules,the opto-mechanical assembly was carried out.The results of opto-mechanical assembly show that the wavelength resolution of the three spectral modules is better than 4 nm,15 nm and 20 nm,respectively.The design indexes of the spectral module are achieved,verifying the rationality of the opto-mechanical design.
The spectral modules of self developed radiometer are introduced.The spectral range covers the visible-short wave infrared band(400 nm～2 500 nm).The methods of opto-mechanical assembly of spectral modules are discussed and the results of opto-mechanical assembly are analyzed.The radiometer consists of three spectral modules:the visible spectral module(400 nm～1 000 nm)(VIS for short),the near-infrared spectral module(900 nm～1 700 nm)(NIR for short),and the short wave infrared spectral module(1 600 nm～2 500 nm)(SWIR for short).The detection units of spectral module use the flat-field concave grating to diffract and focus different wavelengths,use the linear array detector to detect signals.The optical units of spectral modules consist of optical fiber,slit,assembly of reflector,assembly of grating and assembly of detector.Since the effect of opto-mechanical assembly is closely related to optomechanical design,the result of opto-mechanical assembly can reflect the advantages and disadvantages of opto-mechanical design.According to the characteristics of the opto-mechanical design of the spectral modules,the opto-mechanical assembly was carried out.The results of opto-mechanical assembly show that the wavelength resolution of the three spectral modules is better than 4 nm,15 nm and 20 nm,respectively.The design indexes of the spectral module are achieved,verifying the rationality of the opto-mechanical design.
引文
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[15]WANG Guangping,XU Tingfa,NI Guoqiang,et al.Hardware design of infrared dim target real time detection and tracking system based on multiple ADSP-TS201S[J].Optics and Precision Engineering,2007,15(6):941-944.王广平,许廷发,倪国强,等.多ADSP-TS201红外弱小目标实时检测跟踪系统的硬件设计[J].光学精密工程,2007,15(6):941-944.
[2]YIN Yapeng,LI Xin,ZHENG Xiaobing,et al.Design and implemeng of automated site observing radiometer[J].Journal of Atmospheric and Environmental Optics,2016,11(1):44-50.尹亚鹏,李新,郑小兵,等.场地自动化观测辐射计的设计与实现[J].大气与环境光学学报,2016,11(1):44-50.
[3]GU Xingfa,TIAN Guoliang,YU Tao,et al.The radiometric calibration principle and method of space remote sensor[M].Beijing:Science Press,2013:199-200.顾行发,田国良,余涛,等.航天光学遥感器辐射定标原理与方法[M].北京:科学出版社,2013:199-200.
[4]SLATER P N,BIGGAR S F,HOLM R G,et al.Reflectance-and radiance-based methods for the inflight absolute calibration of multispectral sensors[J].Remote Sensing of Environment,2015,22(1):11-37.
[5]HU Xiuqing,ZHANG Yuxiang,QIU Kangmu,et al.Collected papers of China radiometric calibration site[M].Beijing:Ocean Press,2001.胡秀清,张玉香,邱康睦,等.中国遥感卫星辐射校正场科研成果论文选编[M].北京:海洋出版社,2001.
[6]WANG Runsheng,XIONG Shengqing,NIE Hongfeng,et al.Remote sensing geology exploration technology and applied research[J].Acta Geologica Sinica,2011,85(11):1699-1743.王润生,熊盛青,聂洪峰,等.遥感地质勘查技术与应用研究[J].地质学报,2011,85(11):1699-1743.
[7]LIN Xuesong,WANG Shurong,LI Futian.Design and study of the precision scans structure of space infrared FTS[J].Optics and Precision Engineering,2005,13(6):691-696.林雪松,王淑荣,李福田.空间傅里叶变换红外光谱仪用全柔性机构的设计与研究[J].光学精密工程,2005,13(6):691-696.
[8]LI Xin,ZHENG Xiaobing,HONG Jin,et al.Optical and mechanical design of SWIR hyperspectral field spectroradiometer[J].Optics and Precision Engineering,2007,15(11):1656-1661.李新,郑小兵,洪津,等.高光谱短波红外地物光谱仪光机设计[J].光学精密工程,2007,15(11):1656-1661.
[9]ZUO Xiaozhou,ZHANG Yan,YANG Haicheng,et al.Application of quantitative analysis in mech-optic assembly and alignment[J].New Technology&New Process,2015(1):74-77.左晓舟,张燕,杨海成,等.量化分析技术在光机装调工艺中的应用[J].新技术新工艺,2015(1):74-77.
[10]WU Zhonghua,YUAN Lyujun,ZHU Yongtian,et al.Structure design and assembling of compensator for off-axis aspheric surface with large asphericity[J].Journal of Applied Optics,2017,38(4):639-643.武中华,袁吕军,朱永田,等.特大非球面度离轴非球面补偿器结构设计与装调[J].应用光学,2017,38(4):639-643.
[11]YUE Pengyuan,ZHAO Xiting,ZHAO Zhen,et al.Computer-aided alignment method in afocal compressed optical path system[J].Journal of Applied Optics,2016,37(4):607-611.岳鹏远,赵希婷,赵振,等.无焦压缩光路系统的计算机辅助装调方法[J].应用光学,2016,37(4):607-611.
[12]HUANG Lu,HONG Jin,WANG Yuanjun,et al.Model VF921Bfield radiometer[J].Optoelectronic Technology&Information,1998,11(5),37-41.黄鲁,洪津,汪元均,等.VF921B型地物光谱仪[J].光电子技术与信息,1998,11(5),37-41.
[13]STAYLORW F.Degradation rates of the AVHRRvisible channel for the NOAA-6,-7and-9spacecraft[J].Journal of Atmospheric and Oceanic Technology,1990(7):411-423.
[14]HOLBEN B N,KAUFMAN Y J,KENDALL J D.NOAA-11AVHRR visible and near-IR inflight calibration[J].International Journal of Remote Sensing,1990,11(8):1511-1519.
[15]WANG Guangping,XU Tingfa,NI Guoqiang,et al.Hardware design of infrared dim target real time detection and tracking system based on multiple ADSP-TS201S[J].Optics and Precision Engineering,2007,15(6):941-944.王广平,许廷发,倪国强,等.多ADSP-TS201红外弱小目标实时检测跟踪系统的硬件设计[J].光学精密工程,2007,15(6):941-944.