针对双高斯型长焦距光学系统后工作距离较长的特点，在光学系统的后工作距离内设计两块反射镜折转光路，缩小光学仪器的尺寸，节省仪器空间和质量。通过反射作用矩阵计算分析了加入两块反射镜后，系统成像不改变。设计了精密螺纹幅微调机构，用于调整反射镜的俯仰和方位角度，调整后固定；设计了十字线和辐射状相结合的像面标定工装及多显微镜组合使用的装调观察工具，提高了装调效率。规划出粗、精相结合的对无穷远目标标定的装调方法，最终标定像面。所使用的设计方案和装调方法在实际工作中切实可行。

Aimed to the feature for long after work distance of double Gauss long focus optical system,double reflection mirrors was designed to refraction ray, the camera′s size was shortened, with saved space and reduced quality. System′s image had not change by analyzing reflex action matrix calculation after jionting two pieces of reflection mirror. The precision thread trim mechanism was designed for adjusted the pitch and azimuth angle of reflection mirror, then fixed. A image demacrating tool was designed that combing with corss line and radiation shape, and a adjustable observation tool with multiple microscope combination, efficiency was improved. A method combine with coarse and precision was planned out to demarcate focus, finally the image plane calibration was finished. This method has been proven was feasible in the practical work.