根据生产需要，设计、生产了焦距为 8m的卡塞格林式离轴反射系统准直仪，并构建先进装调方法精准装校，通过干涉图像和干涉条纹的判读，使卡式准直仪系统的成像质量接近设计水平，解决生产中准直仪最长焦距只有 3m而无对应的产品所需空间频率的红外鉴别率测试靶板问题。

We design and develop a Cassegrain off-axis reflection system collimator with a focal length of 8 m according to production requirements and construct an advanced installation and adjustment method to accurately calibrate it. Through the interpretation of images and interference fringes, the imaging quality of the collimator system is found to be close to the designed value. We solve the problem of the infrared discrimination test target board in production because the longest focal length of the existing collimator focal length is 3 m, and there is no corresponding spatial frequency required by the product.