作为对高功率激光装置中鬼像的进一步深入研究,在原有鬼像研究的基础上,考虑单透镜鬼像对实际加工、安装中误差的敏感性。运用矩阵光学的方法,推导得到了鬼像点的近似焦距公式,以及由误差引起的鬼像点位置的增加量的一般性表达式。以神光Ⅱ升级装置中终端光学组件的聚焦透镜参数为例对公式作数值分析,结果表明,透镜曲率半径和中心厚度误差对鬼像的影响较小,部分情况下可以忽略;而中心误差对鬼像的影响很明显,在工程设计中应予以重视。 As a further study of ghosting in high power laser devices, based on the original study of ghosts, the sensitivity of the single lens ghosts to the actual processing and installation errors is considered. Using the matrix optics method, the approximate focal length formula of the ghost point and the general expression of the increment of the ghost point position caused by the error are derived. Taking the focusing lens parameter of the terminal optical component in SG upgrade device as an example, the numerical analysis of the formula shows that the influence of the lens radius of curvature and the center thickness on the ghosting is small, and can be neglected in some cases. The center error pair The effect of ghosts is obvious, and should be taken seriously in engineering design.