夜天光

介绍用于微光夜视仪性能评价的夜天光模拟器的原理和系统概念以及对光源、光谱、滤光片等的选择。

The principle , the system concept and the choice of lamp , spectrum , filter of the night sky radiation simulator for the performance evaluation of lowlevellight night vision systems is introduced .

采用GaAs阴极的第三代夜视器件具有灵敏度高和红外响应好的优点，为系统充分利用夜天光辐射创造了有利条件。

Generation ⅲ night vision devices with GaAs photocathodes have high sensitivity and good IR response .

北京天文台兴隆观测站夜天光光谱证认

Identification of the Night Sky Spectra of Xinglong Station , Beijing Astronomical Observatory

夜天光下景物反射光谱特性的研究

A study on the characteristics of reflection spectrum of field of view under night-sky radiation

目前的微光夜视系统靠夜天光照射景物，以被动的方式工作，自身的隐蔽性好。

LLL night vision system depends on the night sky light illumination conditions , i.e. , at a passive work mode .

对夜天光辐射以及一些材料的光谱反射，利用多信息量测控技术，可以将多碱光电阴极的光谱响应峰值移至0.8μm处。

For sounding reflectance of night sky and spectral reflection on some materials , the peak value position of spectral response of multialkali photocathodes can be moved to 0.8 μ m by multi information measuring techniques .

从光谱和光度两个方面分析了微光夜视系统的实际工作环境，设计了照度连续可调的微光光源，利用稳流电源供电，实现了实验室条件下的夜天光模拟。

The actual working condition of night visions is analyzed from aspects of spectrum , illuminance low-light-level ( LLL ) source with continuously adjusted illuminance is designed , and the simulation of LLL condition in lab is realized by using electrical source of steady current .

双谱探测技术是这种彩色微光技术的重要组成部分和理论基础，其关键就是根据夜天光辐射以及景物夜晚光谱反射特性，选择合适的对比度转换点位置，分割有效光谱为两部分；

Two colour detection technology is the important part and theoretical basis of this colour low light level technology . Its crux is the choice of suitable contrast turning position and the division of effective spectrum of night sky and reflection property of night scenery .

作为开拓人眼视觉的夜视技术，自二十世纪三十年代出现以来，已经取得了迅猛的发展和应用。目前的微光夜视系统靠夜天光照射景物，以被动的方式工作，自身的隐蔽性好。

Night vision technique , by which the eye vision can be opened up , has been developed rapidly and used widely since it appeared in 1930s . LLL night vision system depends on the night sky light illumination conditions , i.e. , at a passive work mode .