针对激光主动成像系统中激光照射视场与成像探测视场的同步控制问题, 本文提出了激光光腰焦物距调节和激光发射物镜变焦调节控制两种方法。从基模高斯光束薄透镜变换公式出发, 推导得到了两种方法的同步控制公式, 依据公式可进行视场同步控制方法设计。对同步控制公式进行了数值计算, 结果表明两种控制方法均能对视场同步进行有效的控制, 但进行同步控制设计时, 需要综合考虑激光光腰焦物距、激光发散角和激光发射物镜焦距等参数, 以便使被调节参量的调节控制范围和步长都能满足实际设计要求。从设计的难度上比较, 激光发射物镜变焦调节控制更容易实现。

The field of view of Laser irradiation and imaging detection need to be changed in step in laser active imaging system. Two control methods are presented, which are laser waist focus-object adjustment and zooming adjustment forlaser transmitting objective lens. The control formulas are derived from the transformation formula of thin lens for fundamental mode Gaussian beam, which can be applied to method design of field of view sychronzition control. The results of numerical calculation for control formulas show that the control methods are valid. In order to make the adjustment control range and step be satisfied with the real design requirement, the parameters of laser waist focus-object adjustment, laser divergence angel and focal length of laser transmitting objective lens are need to be considered synthetically when designing. The control method of zooming adjustment for laser transmitting objective lens is easier to be carried out than the method of laser waist focus-object adjustment in terms of design difficulty.