摘要
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.
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.
