无限远微光瞄具目标模拟发生装置研究

Research on Generating Device of Infinite Low Light Level Weapon Sight Target Simulation

根据射手夜间瞄准射击时实际夜天光环境下景物反射的光照度值,计算出进入微光瞄准镜入瞳处的光照度值,以此照度值设计了双积分球照明模式的无限远微光瞄具目标模拟发生装置.根据积分球原理在双积分球之间设置有可变光阑,根据检测系统要求为微光夜视仪提供了四档可切换的微光照度环境.为保证在实验检测过程中待测瞄具能接收到光源出射的最大光照度,分析了待测瞄具距离平行光管的实际安装位置,得出影响待测瞄具入瞳处光照度值的三个关键因素为大小积分球之间可变光阑的口径、平行光管的视场及被测瞄具距离平行光管物镜的安装位置.最后,对积分球出射窗口处光照度,以及经过无限远目标模拟发生装置后出射的光照度值进行分析计算与实验测量,结果表明光照度不均匀度<2%,满足应用要求.

According to scene illumination under night sky radiation, when shooters were aiming and positioning at night , the illumination at the entrance pupil of the sight was calculated, and the generating device for infinite target simulation based on double-integrating-sphere in illumination-mode was designed in accordance with the illumination. Variable diaphragm applied to offer four switchable low light stress environments for the night vision device according to the principle of the integrating sphere, which was setting between the double-integrating-sphere. Meanwhile, for the sake of the maximum illumination could be received by the Low-Light-Level sight during the test, the installation position of the sight relative to collimator was analyzed. The results show that the three crucial factors which influenced the illumination at its entrance pupil are scilicet the clear aperture of the iris diaphragm setting between the double-integrating-sphere, the field of view of the collimator, and the installation position of the Low- Light-Level weapon sight apart from the collimator objective. Finally, the output illuminance of the integrating sphere and generating device were analyzed and calculated, the results of experiment and measuring showed that the illumination non-uniformity is 〈 2%, which can meet the application requirements.