Design of 300-1 100 nm multiband optical imaging system and its stray light analysis
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摘要: 设计了一套300~1 100 nm多波段光学系统,该系统能对目标的近紫外、可见光和近红外3个波段同时成像,可满足目标多波段信息探测的要求。由于在光学系统中镜筒内壁反射和棱镜表面反射会产生杂光和鬼像,因此,利用LightTools软件对此系统的杂光和鬼像进行了模拟分析。模拟结果表明,视场之外11.7~18.3和-11.7~-18.3的入射光线被胶合棱镜上下表面反射后,会聚焦到3个探测器靶面范围内,形成鬼像;6.2~9.8和-6.2~-9.8的入射光线被镜筒反射后会在3个探测器上形成杂光。利用设计的多波段光学系统进行了相关实验,结果证明了模拟分析的正确性,表明此分析能用于指导多波段光学系统的设计和研制。提出了减少杂光和鬼像的相应措施,实验结果验证了提出的措施能够减少杂光及消除鬼像,提高系统成像质量。Abstract: A multichannel optical system working in 300-1 100 nm was designed to detect the information of objects in the multi-band, which could obtain images at the same time in the near ultraviolet, visible and near infrared ranges. As the system was easy to produce stray light and ghost images due to reflecting of barrel and prism, the stray light and ghost images were simulated and analyzed with the help of Light Tools software. From the simulation results, it is shown that the incidences out of the field in the range of 11.7-18.3 and -11.7--18.3 can be reflected by the up and down surfaces of the prism, and then be focused on the image surfaces of the three detectors to form the ghost images; the incidences in the range of 6.2-9.8 and -6.2--9.8 can be reflected by the barrel to form stray lights. The analyzed result was approved by the image achieved from the multichannel system, and it indicates that the analysis is a contribution to design and manufacture of multichannel system. Several kinds of methods to decrease the stray lights and ghost images was proposed and they have been proved to be effective.
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Key words:
- multichannel optical system /
- stray light /
- ghost image /
- imaging quality
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[1] 许洪,王向军. 多光谱、超光谱成像技术在军事上的应用[J]. 红外与激光工程 ,2007,36(1):13-17. XU H,WANG X J. Application of multispectral/hyperspectral imaging technologies in military[J]. Infrared Laser Eng.,2007,36(1):13-17.(in Chinese) [2] 张伟,李克新,武春风,等. 多光谱目标探测的波段选择[J]. 光学技术 ,2005,31(6):893-897. ZHANG W,LI K X,WU CH F,et al.. Wavelength bands selection method of multispectral target detection[J]. Opt. Technique,2005,31(6):893-897.(in Chinese) [3] 钱义先,高晓东,梁伟,等. 多光谱面阵彩色CCD数字航测相机设计[J]. 光子学报 ,2008,37(12):2473-2477. QIAN Y X,GAO X D,LIANG W,et al.. Design of multi-spectral large format chromatic CCD digital aerial photogrammetic camera[J]. Acta Photonica Sinica,2008,37(12):2473-2477.(in Chinese) [4] WAY S P,KERR R,IMAMURA J J,et al.. Design and testing of a dual band enhanced vision system[J]. SPIE,2003,5074:612-619. [5] 方丽,林峰,邱怡申. ASAP模拟变焦系统中鬼像的研究[J]. 应用光学 ,2009,30(6):958-963. FANG L,LIN F,QIU Y SH. Simulation of ghost images in zoom system by ASAP[J]. J. Appl. Opt.,2009,30(6):958-963.(in Chinese) [6] 耿安兵. 光学系统的鬼像分析及快速计算方法[J]. 舰船光学 ,2004,40(4):34-36. GENG A B. Analysis and calculation for the ghost in optical system[J]. Ship Optical,2004,40(4):34-36.(in Chinese) [7] 张红鑫,卢振武,孙强,等. 折/衍混合长波红外凝视成像系统的杂散光分析[J]. 中国光学与应用光学 ,2009,2(5):402-407. ZHANG H X,LU ZH W,SUN Q,et al.. Stray light analysis of diffractive /refractive LW IR staring imaging system[J]. Chinese J. Opt. and Appl. Opt.,2009,2(5):402-407.(in Chinese) -
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