为了研究双光路合成系统中的重要参量与远场光束合成效果的关系，采用理论计算与仿真验证相结合的方法，用ZEMAX软件对双光路合成系统进行了仿真。由理论计算结果与仿真结果比较可知，两者在光束重合程度、重合光斑半径上的相关数据基本吻合。结果表明，当双光路合成系统的参量选定时，利用这种理论计算方法可以很好地计算出远场光束的合成情况。这一结果为双光路合成系统中重要参量值的设置提供了很好的依据。

In order to study the effect of the parameters of double beams combination system on far field combined beams, it was simulated with ZEMAX software and its theoretical result was put forward. After comparison, it was found that the simulated results were similar to the theoretical ones. The calculation theory is suitable for far field beam combination, which affords important references for parameters setting in a double-beam combination system.