Design of an infrared zoom imaging system based on concentric spherical lens with wide FOV and high resolution
Received:May 25, 2019  Revised:November 13, 2019  download
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Author NameAffiliation
YANG Wei  
LIU Jia-Wei Xi’an Key Laboratory of Computational Imaging, Xidian University, Xi’an 710071, China
School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China 
HAN Ping-Li Xi’an Key Laboratory of Computational Imaging, Xidian University, Xi’an 710071, China
School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China 
SHAO Xiao-Peng Xi’an Key Laboratory of Computational Imaging, Xidian University, Xi’an 710071, China
School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China 
ZHAO Xiao-Ming Xi’an Key Laboratory of Computational Imaging, Xidian University, Xi’an 710071, China
School of Physics and Optoelectronic Engineering, Xidian University, Xi’an 710071, China 
Abstract:For staring infrared imaging warning equipment, both wide field of view (FOV) surveillance and accurate target detection are urgently demanded. To meet this requirement, we designed an infrared zoom surveillance system based on concentric spherical lens in this study. It consists of a multi-layer concentric spherical lens and an array of independent continuous zoom cameras. With the spherical lens, a wide FOV is achievable benefiting from its structure. The small camera array enables imaging the target scene into sub-regions. And with the continuous zoom ability, the camera array makes it possible for simultaneous wide FOV surveillance and target identification. When potential targets are detected, further determination and identification can be made by zooming in the corresponding camera to provide high-resolution images. Results show that the modulation transfer function (MTF) curves of the infrared imaging system in the full zoom range are close to the diffraction limit. The zoom curve is smooth avoiding the occurrence of jamming, impact and other adverse phenomena in the zoom process. It provides feasible solution for large field monitoring and high-resolution target identification.
keywords:optics  wide field of view (FOV) imaging  concentric spherical lens  full-motion zoom  target detection and identification  infrared system
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Copyright:《Journal of Infrared And Millimeter Waves》