Test and analysis of the halo in low-light-level image intensifiers |
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| Authors: | Dongxu Cui Ling Ren Feng Shi Jifang Shi Yunsheng Qian Honggang Wang and Benkang Chang |
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| Institution: | 1Institute of Electronic Engineering and Optoelectronic Technology,Nanjing University of Science and Technology,Nanjing 210094,China 2Xi’an Institute of Applied Optics,Xi’an 710065,China 3Science and Technology on Low-Light-Level Night Vision Laboratory,Xi’an 710065,China 4North Night Vision Technology Group Co.,Ltd.,Xi’an 710056,China |
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| Abstract: | A halo tester is designed to analyze the halo formation in low-light-level(LLL) image intensifiers and the influencing factors on halo size.The tester is used to collect a 0.1922-mm hole image directly using a CoolSNAPK4 charge-coupled device(CCD) in a darkroom under illumination conditions between 10?2 and 10?4 lx.The practical measurement result shows that the amplification ratio is 343.4.Then,the super second-and third-generation image intensifiers are placed after the hole,and the halo sizes of the hole images on the screens are determined as 0.2388 and 0.5533 mm,respectively. |
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