摘要
亮度增益是衡量微光像增强器图像增强能力的一个重要技术指标,其直接影响着微光夜视系统的观察效果。为了提高像增强器亮度增益测试的重复性,在给像增强器提供稳定供电的条件下研究了光源色温、光源输出光亮度以及荧光屏发光亮度随时间的变化过程,分析了光源色温和光源输出光亮度对于亮度增益的影响机理以及荧光屏发光亮度对于亮度增益测试的影响过程,确定了光源的预热时间不少于15 min且像增强器的工作时间不少于1 min的结论。实际测试结果表明:当光源充分预热且严格控制像增强器的工作时间时测量得到的像增强器亮度增益的重复性优于3%。
Luminance gain,which was directly affect the image quality of night vision system in low light level condition,was an important technological index to evaluate the ability to amply image light intensity.In order to improve the repetitive characteristic of image intensifier′s luminance gain,changing process of light source color temperature,light source output luminance and screen luminance had been studied respectively,theory of light source color temperature,light source output luminance and screen luminance impacting on luminance gain had been analyzed.The conclusion with warming-up of light source should not be less than 15 minutes and work time for image intensifier should not be less than 1 minute had been established.Test result showed that repetitive characteristic of image intensifier was better than 3% when light source had been warmed-up sufficiently and image intensifier′s work time was controlled strictly.
出处
《红外与激光工程》
EI
CSCD
北大核心
2013年第2期495-498,共4页
Infrared and Laser Engineering
基金
国防科研项目
关键词
亮度增益
重复性
像增强器
色温
荧光屏
luminance gain
repetitive characteristic
image intensifier
color temperature
screen
