本文介绍一种用于跟踪高加速目标的消旋瞄准系统．在大中型经纬仪上一般需配置两维的目视瞄准系统．如果在目视瞄准系统中加入消象旋转棱镜，则配置一个瞄准系统就可解决两维方向上的瞄准观测任务，在使用和精度上都具有很大的经济效益．本文从光学系统中加入消旋棱镜入手，解决由此而带来的结构设计难点，分析光轴偏表达式，找出与其相关的因素，通过正确的装校调整，控制了允许的光轴偏，从而达到设计指标要求． This article describes a racemic targeting system for tracking highly accelerated targets. Large and medium-sized theodolite generally need to configure the two-dimensional visual aiming system. If the eyepiece prism is added to the visual aiming system, a sighting system can be used to solve the sighting task in two dimensions. It is of great economic benefit and accuracy. In this paper, we start with the addition of a deconvolution prism in the optical system to solve the structural design difficulties brought by the analysis, analyze the expression of optical axis deviation, find out the factors related to it, and adjust the allowed optical axis deviation , So as to achieve the design requirements.