对于微光夜视仪国内外一般采用亮分划,采用亮分划固然有它的优点,但也有结构复杂等缺点。在夜视仪器的试制实验阶段,使用暗分划其观察效果还是可以的。下面通过计算来说明。暗分划就是将有黑色不透光刻线的分划板安装在象增强器的荧光屏上。暗分划容易被认为目标象是黑的,分划刻线是黑的,重叠起来不易分辨。事实上目标象和分划刻线之间有一定的对比,人眼是可以分辨开的。 Night vision glow for domestic use generally bright division, the use of bright division has its advantages, but there are also shortcomings of complex structure. In the night-vision equipment pilot experiment phase, the use of dark division of the observation effect is still possible. The following calculation to illustrate. Dark division is the retarder with a black opaque reticle mounted on the intensifier screen. Dark divisions can easily be perceived as the target is black, divide the lines are black, overlap is not easy to distinguish. In fact, there is a certain contrast between the target icon and the dividing line, and the human eye can distinguish and distinguish.