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在航空射击瞄准具中,为了正确地构成提前角与瞄准角,需要测量出敌我间的距离,并将它作为一项重要参量输入瞄准具,和其它参量一起通过计算机构的运算,以精确地构置提前角与瞄准角。测量距离的手段是多种的,如雷达测距、激光测距、光学测距等。目前应用较普遍的是雷达测距和光学测距,通常在瞄准具中二者都被采用。在光学测距中,绝大多数采用外基线法测距。航空射击瞄准具光学显示器部分,通常是准直仪,它将光环机构构成的映象投射在无限远处,观察者通过一块析光反射镜,可同时看到目标和光环象(如图1所示)。
In aerial shooting sights, in order to correctly form the advance angle and the aiming angle, the distance between the enemy and me needs to be measured and input as an important parameter into the sights, and the other parameters are calculated by the calculating mechanism to precisely Configuration advance angle and aiming angle. The means to measure distance are many, such as radar ranging, laser ranging, optical ranging and so on. The most common applications are radar ranging and optical ranging, which are usually used in sights. In optical ranging, the vast majority of external baseline method using ranging. Aiming at an optical display, the part of an optical display, usually a collimator, projects the image of an auroral mechanism at infinity. A viewer can see both the target and the aura at the same time through an evaporative reflector Show).